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searching for Geologic record 180 found (302 total)

First appearance datum (402 words) [view diff] exact match in snippet view article find links to article

paleontologists to designate the first appearance of a species in the geologic record. FADs are determined by identifying the geologically oldest fossil

Tephra (2,028 words) [view diff] exact match in snippet view article find links to article

time, sedimentation occurs incorporating these tephra layers into the geologic record. Tephrochronology is a geochronological technique that uses discrete

Gravel (2,103 words) [view diff] exact match in snippet view article find links to article

Alluvial fans likely contain the largest accumulations of gravel in the geologic record. These include conglomerates of the Triassic basins of eastern North

Aeolian processes (6,014 words) [view diff] exact match in snippet view article find links to article

areas of limited sand availability, they are poorly preserved in the geologic record. Where sand is more abundant, transverse dunes take the form of aklé

Conglomerate (geology) (1,837 words) [view diff] exact match in snippet view article

fans and likely contain the largest accumulations of gravel in the geologic record. Breccias are similar to conglomerates, but have clasts that have angular

Neoproterozoic (1,187 words) [view diff] exact match in snippet view article find links to article

and Ediacaran. One of the most severe glaciation events known in the geologic record occurred during the Cryogenian period of the Neoproterozoic, when global

Volcaniclastics (914 words) [view diff] exact match in snippet view article find links to article

may have contributed as much as a third of all sedimentation in the geologic record. Volcaniclastics are composed of a range of pyroclastic detritus mixed

Principles of Geology (1,546 words) [view diff] exact match in snippet view article find links to article

disappearance in the geologic record for the area, which is now known as mass extinction. Cuvier explained these sudden changes in the geologic record with catastrophic

Volcanic dam (1,359 words) [view diff] exact match in snippet view article find links to article

and active volcanic provinces, and are known to have existed in the geologic record, in historic times and occur in the present day. Their removal or failure

Dolomite (rock) (3,407 words) [view diff] exact match in snippet view article

problem" refers to the vast worldwide depositions of dolomite in the past geologic record in contrast to the limited amounts of dolomite formed in modern times

Carbonatite (2,117 words) [view diff] exact match in snippet view article find links to article

easily weathered and are therefore unlikely to be preserved in the geologic record. Carbonatite eruptions as lava may therefore not be as uncommon as

Calabozos (3,137 words) [view diff] no match in snippet view article find links to article

Calabozos is a Holocene caldera in central Chile's Maule Region (7th Region). Part of the Chilean Andes' volcanic segment, it is considered a member of

Relict (geology) (464 words) [view diff] exact match in snippet view article

study of soil formation and classification, ancient soil found in the geologic record is called a paleosol, material formed in the distant past on what was

Paleontology in Kentucky (3,420 words) [view diff] exact match in snippet view article find links to article

start of the Permian to the Pleistocene, there is a large gap in the geologic record, although the gap is interrupted by minor deposits of Cretaceous and

Siberian Traps (2,681 words) [view diff] exact match in snippet view article find links to article

Permian–Triassic extinction event, the most severe extinction event in the geologic record. Subsequent periods of Siberian Traps activity have been linked to

Paleontology in Illinois (2,226 words) [view diff] exact match in snippet view article find links to article

often of very high preservational quality. There is a gap in Illinois' geologic record from the Mesozoic to the Pleistocene. During the Ice Age, Illinois

Geology of Antigua and Barbuda (429 words) [view diff] exact match in snippet view article find links to article

from the Pleistocene and include reef and lagoon related rocks. The geologic record of Antigua indicates a transition from island arc volcanism to limestone

Mudrock (3,277 words) [view diff] exact match in snippet view article find links to article

classification scheme. Mudrocks make up 50% of the sedimentary rocks in the geologic record and are easily the most widespread deposits on Earth. Fine sediment

Aragonite sea (1,190 words) [view diff] exact match in snippet view article find links to article

derivatives of ancient seawater trapped in halite crystals in the geologic record (fluid inclusions). Deleuze, Marl; Brantley, Susan L. (1997). "Inhibition

Geology of the Grand Canyon area (6,818 words) [view diff] exact match in snippet view article find links to article

extinct desert. There are at least 14 known unconformities in the geologic record found in the Grand Canyon. Uplift of the region started about 75 million

Earliest known life forms (7,288 words) [view diff] exact match in snippet view article find links to article

vent precipitates from Barberton, South Africa. Much later in the geologic record, likely starting in 1.73 Ga, preserved molecular compounds of biologic

Sand geyser (425 words) [view diff] exact match in snippet view article find links to article

occurs in association with earthquakes and other seismic events. In the geologic record, these are seen as clastic dikes. It is described as "a geyser of sand

Rhizolith (1,411 words) [view diff] exact match in snippet view article find links to article

roots, are important for identifying paleosols in the post-Silurian geologic record. Rock units whose structure and fabric were established largely by

Sequence stratigraphy (2,621 words) [view diff] exact match in snippet view article find links to article

there is a clear gap in the record. Conversely within a sequence the geologic record should be relatively continuous and complete record that is genetically

Magnetofossil (1,564 words) [view diff] exact match in snippet view article find links to article

produced by magnetotactic bacteria (magnetobacteria) and preserved in the geologic record. The oldest definitive magnetofossils formed of the mineral magnetite

Shocked quartz (664 words) [view diff] exact match in snippet view article find links to article

significantly contribute to the accumulation of shocked quartz in the geologic record. Mantle xenoliths and sediments derived from them may contain coesite

Heinz A. Lowenstam (1,472 words) [view diff] exact match in snippet view article find links to article

research on coral reefs and their influence on biologic processes in the geologic record. Heinz Adolf Lowenstam was born in 1912 in Upper Silesia, which was

Paleolightning (3,275 words) [view diff] exact match in snippet view article find links to article

and global average temperatures. Detecting lightning activity in the geologic record can be difficult, given the instantaneous nature of lightning strikes

Sedimentary basin (4,634 words) [view diff] exact match in snippet view article find links to article

basin development as a result of isostasy. The long-term preserved geologic record of a sedimentary basin is a large scale contiguous three-dimensional

Novopangaea (396 words) [view diff] exact match in snippet view article find links to article

supercontinent will form in that time frame. Beyond that, he cautions that the geologic record is full of unexpected shifts in tectonic activity that make further

Stratigraphy (1,208 words) [view diff] exact match in snippet view article find links to article

region, and then to every region, and by extension to provide an entire geologic record of the Earth. A gap or missing strata in the geological record of an

Contact (geology) (960 words) [view diff] exact match in snippet view article

in the rock beds. Conformable contacts represent no time gap in the geologic record. They are usually planar, though they may have slightly irregular topography

Rhythmite (705 words) [view diff] exact match in snippet view article find links to article

Rhythmites may be deposited with periodicities other than annual. The geologic record captures both more frequent events (e.g., tides) and less frequent

Pangean megamonsoon (3,325 words) [view diff] exact match in snippet view article find links to article

monsoon circulation was first proposed in 1973. The evaporites in the geologic record suggest vast and extensive regions of persistent dry conditions near

Lastarria (6,340 words) [view diff] no match in snippet view article find links to article

Lastarria is a 5,697 metres (18,691 ft) high stratovolcano that lies on the border between Chile and Argentina. It is remote, and the surroundings are

Crater chain (440 words) [view diff] case mismatch in snippet view article find links to article

Weissman, P. R. (June 1996). "Cometary Nuclei and Tidal Disruption: The Geologic Record of Crater Chains on Callisto and Ganymede". Icarus. 21 (2): 249–274

Paleontology in Oklahoma (5,811 words) [view diff] exact match in snippet view article find links to article

fossils in the United States due to having an exceptionally complete geologic record of the epoch. From the Cambrian to the Devonian, all of Oklahoma was

Pangaea (4,689 words) [view diff] exact match in snippet view article find links to article

Pangaea is the most recent supercontinent reconstructed from the geologic record and therefore is by far the best understood. The formation of supercontinents

Mastcam-Z (831 words) [view diff] exact match in snippet view article find links to article

overall landscape geomorphology, processes, and the nature of the geologic record (mineralogy, texture, structure, and stratigraphy) at the rover field

Aurica (supercontinent) (516 words) [view diff] exact match in snippet view article

without supercontinent formation. Beyond that, he cautions that the geologic record is full of unexpected shifts in tectonic activity that make further

Flood basalt (4,902 words) [view diff] exact match in snippet view article find links to article

rocks, forming enormous deposits of basaltic rock found throughout the geologic record. They are a highly distinctive form of intraplate volcanism, set apart

Limestone (8,458 words) [view diff] exact match in snippet view article find links to article

compositions of carbonate rocks show an uneven distribution in time in the geologic record. About 95% of modern carbonates are composed of high-magnesium calcite

Aguas Calientes caldera (2,063 words) [view diff] no match in snippet view article find links to article

Aguas Calientes is a major Miocene caldera in Salta Province, Argentina. It is in the Central Volcanic Zone of the Andes, a zone of volcanism covering

Amasia (supercontinent) (340 words) [view diff] exact match in snippet view article

supercontinent will form in that time frame. Beyond that, he cautions that the geologic record is full of unexpected shifts in the tectonic activity that make further

True polar wander on Mars (428 words) [view diff] exact match in snippet view article find links to article

91–141 Tanaka, K.L., 2000. "Dust and ice deposition in the Martian geologic record". Icarus 144, 254–266. Fishbaugh, K., Head, J. 2000. "North polar region

Geology of the Death Valley area (5,546 words) [view diff] exact match in snippet view article find links to article

at least 23 formations of sedimentary units, two major gaps in the geologic record called unconformities, and at least one distinct set of related formations

Pali-Aike volcanic field (6,250 words) [view diff] no match in snippet view article find links to article

The Pali-Aike volcanic field is a volcanic field along the Argentina–Chile border. It is part of a family of back-arc volcanoes in Patagonia, which formed

Paleoflooding (3,549 words) [view diff] exact match in snippet view article find links to article

The phenomenon of paleoflooding is apparent in the geologic record over various spatial and temporal scales. It often occurred on a large scale, and was

Bandelier Tuff (2,678 words) [view diff] exact match in snippet view article find links to article

Bandelier Tuff was one of the first ignimbrites recognized in the geologic record, and has been extensively studied by geologists seeking to understand

Antofalla (4,756 words) [view diff] no match in snippet view article find links to article

Antofalla is a Miocene-Pliocene volcano in Argentina's Catamarca Province. It is part of the volcanic segment of the Andes in Argentina, and it is considered

Avulsion (river) (1,336 words) [view diff] exact match in snippet view article

deposition in the delta. This deposition fills the channels and leaves a geologic record of channel avulsion in sedimentary basins. On average, an avulsion

Afro-Eurasia (1,264 words) [view diff] exact match in snippet view article find links to article

supercontinent will form within the settled time frame, however, and the geologic record is full of unexpected shifts in tectonic activity that make further

Chronology of continents (757 words) [view diff] case mismatch in snippet view article find links to article

Rodinia and Pannotia, p. 68 Bradley, D.C. (2011). "Secular Trends in the Geologic Record and the Supercontinent Cycle". Earth-Science Reviews. 108 (1–2): 16–33

Cerro Guacha (3,121 words) [view diff] no match in snippet view article find links to article

Cerro Guacha is a Miocene caldera in southwestern Bolivia's Sur Lípez Province. Part of the volcanic system of the Andes, it is considered to be part of

Volcano (10,952 words) [view diff] exact match in snippet view article find links to article

and about 60 historical VEI 8 eruptions have been identified in the geologic record over millions of years. A supervolcano can produce devastation on a

Phoenix Mountains (656 words) [view diff] exact match in snippet view article find links to article

quartzite and volcaniclastic rocks that extend toward Quartzite Ridge. No geologic record is retained in the Phoenix area regarding what happened between the

Samuel Bowring (404 words) [view diff] exact match in snippet view article find links to article

of geologic processes and the timing of significant events in the geologic record. He investigated the explosion of multi-cellular life in the Early

Danian (1,393 words) [view diff] exact match in snippet view article find links to article

which took place over a 170–230 kyr time interval, is evidenced in the geologic record by two negative carbon isotope excursions and is believed to have led

System (disambiguation) (510 words) [view diff] exact match in snippet view article

nature, society, and science System (stratigraphy), a unit of the geologic record of a rock column Systems engineering, a field about design, integration

Lava (6,601 words) [view diff] exact match in snippet view article find links to article

sole example of an active carbonatite volcano. Carbonatites in the geologic record are typically 75% carbonate minerals, with lesser amounts of silica-undersaturated

Ojo Alamo Formation (475 words) [view diff] exact match in snippet view article find links to article

divided into two subunits separated by a large unconformity—a gap in the geologic record. The lower Naashoibito member (sometimes considered part of the Kirtland

Japan Trench (2,421 words) [view diff] exact match in snippet view article find links to article

turbidity currents. These turbidites preserve the sediment deposits as a geologic record of past large earthquakes by indicating the change in sediment deposition

Proterozoic (2,473 words) [view diff] exact match in snippet view article find links to article

and provides the first obvious fossil evidence of life on Earth. The geologic record of the Proterozoic Eon is more complete than that for the preceding

Geology of the Capitol Reef area (5,479 words) [view diff] exact match in snippet view article find links to article

millions of years. The various kinds of unconformities are gaps in the geologic record. Such gaps can be due to a prolonged absence of deposition or due to

Uranium–lead dating (1,288 words) [view diff] exact match in snippet view article find links to article

traditionally used for age dating, but are more commonly available in the geologic record. During the alpha decay steps, the zircon crystal experiences radiation

Large igneous province (4,643 words) [view diff] exact match in snippet view article find links to article

a common geochemical proxy used to detect massive volcanism in the geologic record, although its foolproofness has been called into question. These LIPs

Geological history of Mars (1,864 words) [view diff] exact match in snippet view article find links to article

formation of the Hellas impact basin, between 4.1 and 3.8 Gya. Most of the geologic record of this interval has been erased by subsequent erosion and high impact

Coal combustion products (7,374 words) [view diff] exact match in snippet view article find links to article

modern fly ash were released into the oceans, which is preserved in the geologic record in marine deposits located in the Canadian High Arctic. It has been

Caliche (2,157 words) [view diff] exact match in snippet view article find links to article

characteristic landforms in arid environments. Calcrete is found throughout the geologic record, forming a record of past climate. Examples include Mississippian calcretes

Yoldia Sea (1,219 words) [view diff] exact match in snippet view article find links to article

has been dated based on 292–309 annual deposition varves seen in the geologic record, which depend on where measured along the coast line. The Yoldia Sea –

Callaghan Valley (438 words) [view diff] exact match in snippet view article find links to article

between 25,000 and 11,000 years ago whose age is extremely young in the geologic record. The Callaghan Valley is a unique microclimate surrounded by a circular

Paleontology in Georgia (U.S. state) (1,184 words) [view diff] exact match in snippet view article

included blastoids, bryozoans, cephalopods, crinoids, and gastropods. The geologic record of the Triassic is sparse in Georgia and the Jurassic is absent altogether

Deep time (2,401 words) [view diff] exact match in snippet view article find links to article

marking a break in Earth's natural history that is visible in the geologic record. Anthropologists and philosophers have further explored the cultural

Deicke and Millbrig bentonite layers (1,668 words) [view diff] exact match in snippet view article find links to article

bentonite layers. Due to the large expanse of these layers in the geologic record outcrops can be found all over the country. Some researchers have worked

Hadean (3,481 words) [view diff] exact match in snippet view article find links to article

Science. p. 30. ISBN 9780081029091. Lowe, DR; Byerly, GR (2015). "Geologic record of partial ocean evaporation triggered by giant asteroid impacts, 3

Pangaea Proxima (2,032 words) [view diff] exact match in snippet view article find links to article

without supercontinent formation. Beyond that, he cautions that the geologic record is full of unexpected shifts in tectonic activity driven by currents

Supercontinent (3,806 words) [view diff] case mismatch in snippet view article find links to article

1016/S0899-5362(99)00018-4. Bradley, D.C. (2011). "Secular Trends in the Geologic Record and the Supercontinent Cycle". Earth-Science Reviews. 108 (1–2): 16–33

Phosphatization (964 words) [view diff] exact match in snippet view article find links to article

of the most spectacular cellular-level preservation known from the geologic record. The fossils include what may be metazoan blastulas, possibly animal

Tatyana G. Rautian (426 words) [view diff] case mismatch in snippet view article find links to article

2024-06-14. "Hoosier Geologic Record 1993". Hoosier Geologic Record. 1993. hdl:10333/16122. "Hoosier Geologic Record 1994". Hoosier Geologic Record. 1994. hdl:10333/16123

Farallon Negro (volcano) (3,730 words) [view diff] no match in snippet view article

27°15′S 66°33′W / 27.250°S 66.550°W / -27.250; -66.550 Farallon Negro is a volcano in the Catamarca province of Argentina. Active between about 9-8

Mojave Desert (4,046 words) [view diff] exact match in snippet view article find links to article

at least 23 formations of sedimentary units, two major gaps in the geologic record called unconformities, and at least one distinct set of related formations

Beethoven quadrangle (2,678 words) [view diff] exact match in snippet view article find links to article

the bombardment and accretionary histories of the three bodies. The geologic record shows a period of decreasing meteoroid flux on all three, wherein the

Mars Astrobiology Explorer-Cacher (2,510 words) [view diff] exact match in snippet view article find links to article

support and sustain life on Mars are currently present, and the Martian geologic record offers tantalizing clue of many ancient habitable environments. If

Raindrop impressions (532 words) [view diff] exact match in snippet view article find links to article

should occur equally on sand-sized material as well as mud, yet in the geologic record these impressions are largely confined to fine-grained rock. Even when

Giant magnetofossils (789 words) [view diff] exact match in snippet view article find links to article

marine sediments spanning from the Cretaceous (97 Ma) to the modern geologic record in the Cenozoic. Though they may occur in a wide range of various aquatic

Death Valley National Park (7,043 words) [view diff] exact match in snippet view article find links to article

the Ibex Formation. An angular unconformity (an uneven gap in the geologic record) followed. A true ocean basin developed to the west, breaking all the

Central Oregon Coast Range (1,503 words) [view diff] exact match in snippet view article find links to article

Eocene to Paleocene age. Portions of this include marine fossils in the geologic record. Sandstone and shale are also present in the sections of the mountains

Stromatolite (3,961 words) [view diff] exact match in snippet view article find links to article

(that is, green algae). One genus of stromatolite very common in the geologic record is Collenia. The connection between grazer and stromatolite abundance

Hirnantian (2,073 words) [view diff] exact match in snippet view article find links to article

of the Hirnantian Stage is defined by the first appearance in the geologic record of the graptolite Normalograptus extraordinarius, and thus, the Normalograptus

Erg (landform) (1,610 words) [view diff] case mismatch in snippet view article

Judith Totman (2001). Interpreting Pre-Quaternary Climate from the Geologic Record. Columbia University Press. p. 166. ISBN 978-0-231-10207-0. Landforms

Peter Ward (paleontologist) (1,649 words) [view diff] exact match in snippet view article

Evolution series (2001) to discuss the evidence for evolution in the geologic record and has appeared on NOVA scienceNOW. He was also one of the scientists

Petrified wood (3,164 words) [view diff] exact match in snippet view article find links to article

While wood petrified in this setting is only a minor part of the geologic record, hot spring deposits are important to paleontologists because such

Agroecomyrmecinae (1,434 words) [view diff] exact match in snippet view article find links to article

clade. Given the early appearance of the Agroecomyrmecinae in the geologic record, the similarities of armadillo ants to Myrmicinae were hypothesized

Triassic (7,836 words) [view diff] exact match in snippet view article find links to article

trend is superimposed by 22 sea level drop events widespread in the geologic record, mostly of minor (less than 25-metre (82 ft)) and medium (25–75-metre

Paleontology in Pennsylvania (2,387 words) [view diff] exact match in snippet view article find links to article

the ensuing Tertiary period of the Cenozoic era in Pennsylvania's geologic record. However, during the Pleistocene, glaciers covered much of the state

Bruce Jakosky (2,514 words) [view diff] exact match in snippet view article find links to article

and B.M. Jakosky, Atmospheric loss since the onset of the martian geologic record: The combined role of impact erosion and sputtering, J. Geophys. Res

Volcanic gas (2,773 words) [view diff] exact match in snippet view article find links to article

(September 2019). "Mercury as a proxy for volcanic emissions in the geologic record". Earth-Science Reviews. 196: 102880. Bibcode:2019ESRv..19602880G.

Colorado National Monument (1,668 words) [view diff] exact match in snippet view article find links to article

also included as an example of the Mission 66 program. The park's geologic record preserves three different groups of rock and sediment. The oldest rocks

Pronghorn (4,444 words) [view diff] case mismatch in snippet view article find links to article

Wyoming, U.S.A. Records a Detailed Faunal, Floral, aDNA, Isotopic, and Geologic Record of the Late Quaternary. 647–648: 81–87. doi:10.1016/j.quaint.2022.08

Amazonis quadrangle (4,001 words) [view diff] exact match in snippet view article find links to article

1038/s41467-018-05291-5 Tanaka, K. L. Dust and ice deposition in the Martian geologic record. Icarus 144, 254–266 (2000). Wilson, J. et al. 2018. Equatorial locations

Ordovician (7,816 words) [view diff] exact match in snippet view article find links to article

Robert J. (1989). "Temporal variations in tempestite thickness may be a geologic record of atmospheric CO2". Geology. 17 (10): 951. doi:10

Osmundastrum (1,119 words) [view diff] exact match in snippet view article find links to article

is considered a living fossil because it has been identified in the geologic record as far back as 75 million years ago. The oldest member of the genus

Oceans of Kansas (book) (578 words) [view diff] exact match in snippet view article

in central Northwestern Kansas (e.g., Trego and Gove Counties). The geologic record shows that ancient lifeforms such as marine reptiles, pteranodons,

Paleoliquefaction (607 words) [view diff] exact match in snippet view article find links to article

flows like water, leaving several kinds of evidence behind in the geologic record. Dikes are intrusions of a lower liquefied sand that penetrate strata

Bacteriohopanepolyol (1,465 words) [view diff] exact match in snippet view article find links to article

and allows for them to be preserved for long periods of time in the geologic record. However, the use of BHPs as a biomarker for a specific group of bacteria

Mount Pinatubo (4,445 words) [view diff] exact match in snippet view article find links to article

largest. The 1991 eruption was among the smallest documented in its geologic record. The volcano has never grown very large between eruptions, because

Great Valley Sequence (2,191 words) [view diff] exact match in snippet view article find links to article

Batholiths and metamorphosed volcanic rocks in the Sierra Nevada are the geologic record of this volcanic arc. As these ancient Sierran volcanoes were rapidly

Lubbock Lake Landmark (1,427 words) [view diff] exact match in snippet view article find links to article

drying trend occurring at Lubbock Lake over the last 11,000 years. The geologic record begins with stream deposits, followed by lake sedimentation, and finishes

Sulfur cycle (7,393 words) [view diff] exact match in snippet view article find links to article

precipitate out of solution. 3.8–3.6 Ga marks the beginning of the exposed geologic record because this is the age of the oldest rocks on Earth. Metasedimentary

Plastiglomerate (792 words) [view diff] exact match in snippet view article find links to article

could potentially form a marker horizon of human pollution on the geologic record. and may survive as future fossils. Plastiglomerate may also conceivably

Sierra de las Quijadas National Park (1,530 words) [view diff] exact match in snippet view article find links to article

completely filled 100 mya. The following 75 Ma are missing from the geologic record and are assumed to be a period of calm. During the Tertiary, the layers

Quaternary glaciation (5,401 words) [view diff] exact match in snippet view article find links to article

several major periods of ancient glaciation in various parts of the geologic record. Such evidence suggests major periods of glaciation prior to the current

Micrometeorite (4,567 words) [view diff] exact match in snippet view article find links to article

Taylor, S.; Brownlee, D. E. (1991), "Cosmic spherules in the geologic record", Meteoritics, 26 (3): 203–211, Bibcode:1991Metic..26..203T, doi:10

Gondwana (7,958 words) [view diff] case mismatch in snippet view article find links to article

Cocks 2013, Abstract Bradley, D.C. (2011). "Secular Trends in the Geologic Record and the Supercontinent Cycle". Earth-Science Reviews. 108 (1–2): 16–33

Armored mud ball (1,364 words) [view diff] exact match in snippet view article find links to article

disintegrate after drying out, making them a rare occurrence in the geologic record. However, if armored mud balls are buried quickly, there is a chance

Geomicrobiology (3,955 words) [view diff] exact match in snippet view article find links to article

Microbially induced sedimentary structures (MISS) are found throughout the geologic record up to 3.2 billion years old. They are formed by the interaction of

Pediment (geology) (1,207 words) [view diff] exact match in snippet view article

their formation. Ancient pediments surfaces have been found in the geologic record as far back as the Proterozoic. The processes responsible for creating

Volcanic winter (5,037 words) [view diff] exact match in snippet view article find links to article

triggering the most extraordinary episode of climate change in the geologic record. Population bottlenecks—a sharp decrease in the population of a species

Comet Shoemaker–Levy 9 (5,513 words) [view diff] case mismatch in snippet view article find links to article

Weissman, Paul R. (June 1996). "Cometary Nuclei and Tidal Disruption: The Geologic Record of Crater Chains on Callisto and Ganymede". Icarus. 121 (2): 249–24

Punctuated equilibrium (5,650 words) [view diff] exact match in snippet view article find links to article

"evolution by creeps." The sudden appearance of most species in the geologic record and the lack of evidence of substantial gradual change in most species—from

Miracinonyx (3,569 words) [view diff] case mismatch in snippet view article find links to article

Wyoming, U.S.A. Records a Detailed Faunal, Floral, aDNA, Isotopic, and Geologic Record of the Late Quaternary. 647–648: 81–87. Bibcode:2023QuInt.647...81H

Geology of the Dallas–Fort Worth Metroplex (3,263 words) [view diff] exact match in snippet view article find links to article

sediments of mostly Cretaceous age, which also obscures a much older geologic record. Sediments older than Cretaceous can only be found at the surface in

Lawsonite (1,436 words) [view diff] exact match in snippet view article find links to article

Lawsonite also occurs in eclogite, although it is rarely preserved in the geologic record. A common assemblage in lawsonite eclogite is garnet + omphacite +

Anza-Borrego Desert State Park (3,897 words) [view diff] exact match in snippet view article find links to article

Coachella Valley. Over the past seven million years, a relatively complete geologic record of over 20,000 ft (6,100 m) of fossil-bearing sediment has been deposited

Geology of the Bryce Canyon area (3,374 words) [view diff] exact match in snippet view article find links to article

Bridge, were carved from sandstone beds in the Claron. A gap in the geologic record following deposition of the Claron Formation was interrupted 34 to

Canyonlands National Park (4,674 words) [view diff] exact match in snippet view article find links to article

resulted. A period of erosion then ensued, creating a break in the geologic record called an unconformity. Early in the Permian an advancing sea laid

James Hutton (5,584 words) [view diff] exact match in snippet view article find links to article

time for the changes. Contemporary investigations had shown that the geologic record required vast time, but no good way of assigning actual years was found

Propædia (2,479 words) [view diff] case mismatch in snippet view article find links to article

Development of the Earth and Its Envelopes 2.4.2 The Interpretation of the Geologic Record 2.4.3 Eras and Periods of Geologic Time The lead author was René Dubos

Mount Baker (5,184 words) [view diff] exact match in snippet view article find links to article

is the last episode of undoubted magmatic activity preserved in the geologic record. First, the largest collapse in the history of the volcano occurred

Paleontology in South Dakota (2,229 words) [view diff] exact match in snippet view article find links to article

deposited. During the Triassic period, sedimentation resumed. The geologic record reveals that South Dakota was a moist coastal plain at that time. Seawater

Berkeley, California (13,350 words) [view diff] exact match in snippet view article find links to article

times (except possibly in 1836), but seismologists warn about the geologic record of large temblors several times in the deeper past. The current assessment

Orogenic collapse (1,491 words) [view diff] exact match in snippet view article find links to article

construction, growth and collapse of the Variscan orogenic belt: the geologic record of the French Massif Central". Bulletin de la Société Géologique de

Gaia hypothesis (9,256 words) [view diff] exact match in snippet view article find links to article

still undergo vectorial change at longer time scales? How can the geologic record be used to examine these questions?" "What is the structure of Gaia

Impact events on Jupiter (7,107 words) [view diff] case mismatch in snippet view article find links to article

; Asphaug, Erik (1996). "Cometary Nuclei and Tidal Disruption: The Geologic Record of Crater Chains on Callisto and Ganymede". Icarus. 121 (2): 249–24

Geology of the Canyonlands area (1,629 words) [view diff] exact match in snippet view article find links to article

Colorado River. A period of erosion then ensued, creating a break in the geologic record called an unconformity. Early in the Permian a transgressing (advancing)

Mark Boslough (1,588 words) [view diff] exact match in snippet view article find links to article

interacting atmospheric plumes from bolide swarm: evidence in the geologic record?. Silica '96: Meeting on Libyan Desert Glass and related desert events

Oak Ridges Moraine (4,257 words) [view diff] exact match in snippet view article find links to article

overlying stratigraphic successions is an unconformity (a gap in the geologic record) where many millions of years of depositional or crystalline record

American lion (5,641 words) [view diff] case mismatch in snippet view article find links to article

Wyoming, U.S.A. Records a Detailed Faunal, Floral, aDNA, Isotopic, and Geologic Record of the Late Quaternary. 647–648: 81–87. Bibcode:2023QuInt.647...81H

List of largest volcanic eruptions (3,667 words) [view diff] exact match in snippet view article find links to article

often associated with breakup of supercontinents such as Pangea in the geologic record, and may have contributed to a number of mass extinctions. Most large

Banded iron formation (7,125 words) [view diff] exact match in snippet view article find links to article

Abundance of banded iron formation in the geologic record. Color indicates dominant type. Red = older Archean formations; green = Greater Gondwana formations;

Lilliput effect (784 words) [view diff] exact match in snippet view article find links to article

terrestrial, is notably smaller than those preceding and following in the geologic record. The extinction event may have been more severe for the larger-bodied

Dianne Newman (663 words) [view diff] exact match in snippet view article find links to article

pathways, interpret the chemical signatures of early life found in the geologic record, and understand how multicellular bacterial communities survive in

Turakirae Head (845 words) [view diff] exact match in snippet view article find links to article

Head from the Riddiford Estate, in order to protect and preserve the geologic record shown by the raised beaches along the shoreline which were in danger

Isotopic signature (4,775 words) [view diff] exact match in snippet view article find links to article

Mass-independent sulfur isotope fractionations are found to be widespread in the geologic record before about 2.45 billion years ago, and these isotopic signatures

Picea critchfieldii (2,776 words) [view diff] exact match in snippet view article find links to article

degrees of magnitude. The Late Quaternary is well-represented in the geologic record at globally-distributed sites. Sites representative of the Late Quaternary

2011 Virginia earthquake (7,322 words) [view diff] exact match in snippet view article find links to article

distance over which landslides occur may also help us reach back into the geologic record to look for evidence of past major earthquakes from the Virginia seismic

Mount Jefferson (Oregon) (6,630 words) [view diff] exact match in snippet view article

Jefferson does not exceed 1 in 100,000. However, given the incomplete geologic record, imprecise dating of its known deposits, and its lack of relatively

Granite Mountains (Alaska) (803 words) [view diff] case mismatch in snippet view article

, and Thorson, R.M., eds., pp. 123-150, Glaciation in Alaska, the Geologic Record. Anchorage, Alaska, Alaska Geological Society. 265 pp. 63°46′50″N 145°23′59″W

South Pass greenstone belt (1,868 words) [view diff] exact match in snippet view article find links to article

breccias and intensely folded schists, representing a major break in the geologic record, is found at the top of the formation. The Goldman Meadows Formation

Cold seep (11,187 words) [view diff] exact match in snippet view article find links to article

techniques. Cold seep deposits are found throughout the Phanerozoic geologic record, especially in the Late Mesozoic and Cenozoic. Notable examples can

Kapthurin Formation (2,093 words) [view diff] exact match in snippet view article find links to article

Chemeron and Kapthurin likely represents a significant gap in the geologic record, then. The majority of radiometric dates in the Kapthurin are Argon-Argon

Bioturbation (7,579 words) [view diff] exact match in snippet view article find links to article

at shallower depths. Arthropods, in particular are important to the geologic record of bioturbation of Eolian sediments. Dune records show traces of burrowing

Park City Formation (1,071 words) [view diff] exact match in snippet view article find links to article

Dinwoody Formation. The last epoch of the Permian is missing from the geologic record in this area, meaning there is a time gap of around 8 million years

Mary C. Hill (667 words) [view diff] case mismatch in snippet view article find links to article

accessed 2019-09-02 "Distinguished Hydrologist Comes to KU" (PDF), The KU Geologic Record, 10: 2, September 2014[permanent dead link] Professor establishes research

Paleoshoreline (1,654 words) [view diff] exact match in snippet view article find links to article

2019.07.023. Cronin, T. M. (n.d.). Sea level change: Lessons from the geologic record. https://pubs.usgs.gov/fs/0117-95/report.pdf Barrett, Katherine (June

Tatuidris (2,724 words) [view diff] exact match in snippet view article find links to article

clade. Given the early appearance of the Agroecomyrmecinae in the geologic record, the similarities of armadillo ants to Myrmicinae were hypothesized

Halomonas meridiana (860 words) [view diff] exact match in snippet view article find links to article

"Aerobic microbial dolomite at the nanometer scale: Implications for the geologic record". Geology. 36 (11): 879. Bibcode:2008Geo....36..879S. doi:10.1130/g25013a

Worlds in Collision (4,768 words) [view diff] exact match in snippet view article find links to article

is a brief in favour of global, cosmic catastrophes to explain the geologic record; but it does not make its case to the exclusion of alternate explanations

Evolutionary history of plants (17,652 words) [view diff] exact match in snippet view article find links to article

and Silurian show a 1.4 times greater proportion of mudrock in the geologic record than the previous 90% of earth's history and this increase in mudrock

Biological pump (16,326 words) [view diff] exact match in snippet view article find links to article

carbon that is permanently buried at the sea floor becomes part of the geologic record. Calcium carbonate often forms remarkable deposits that can then be

Siberian natural resources (2,068 words) [view diff] exact match in snippet view article find links to article

of much fly ash in sediments across the world. See Fly ash#In the geologic record. The Siberian petroleum sources follow (in tonnes - 1 tonne of petroleum

Geology of the Grand Teton area (4,882 words) [view diff] exact match in snippet view article find links to article

rocks. The Precambrian rocks were uplifted during this gap in the geologic record known as an unconformity; exposed to erosion they were gradually worn

List of lay Catholic scientists (4,569 words) [view diff] exact match in snippet view article find links to article

paleontologist who provided the first example of evolution described from the geologic record, after studying Jurassic ammonites James Joseph Walsh (1865–1942) –

Boring Billion (8,157 words) [view diff] exact match in snippet view article find links to article

oceans to be a black-and milky-turquoise color instead of blue. Earth's geologic record indicates two events associated with significant increases in oxygen

Clastic dike (3,076 words) [view diff] exact match in snippet view article find links to article

associated with earthquakes – A large variety of dikes are found in the geologic record. However, clastic dikes are typically produced by seismic disturbance

Particulate inorganic carbon (6,079 words) [view diff] exact match in snippet view article find links to article

carbon that is permanently buried at the sea floor becomes part of the geologic record. Calcium carbonate often forms remarkable deposits that can then be

Carbonate-associated sulfate (5,673 words) [view diff] exact match in snippet view article find links to article

sulfate minerals within evaporites, which are somewhat sparse in the geologic record, often poorly preserved, and necessarily associated with complicated

Isoarborinol (1,195 words) [view diff] exact match in snippet view article find links to article

isoarborinol loses its hydroxyl group and becomes saturated. Arborane is the diagenetic end product of isoarborinol that gets preserved in the geologic record.

North African climate cycles (3,786 words) [view diff] exact match in snippet view article find links to article

of large lakes in the Sahara can be found and interpreted from the geologic record. These lakes fill as the precession cycle approaches the insolation

Wendell P. Woodring (1,734 words) [view diff] case mismatch in snippet view article find links to article

organized the Woodring Conference on Major Biologic Innovations and the Geologic Record. The Woodring Conference, attended by twenty-three scientists from

Marc Lafia (2,874 words) [view diff] case mismatch in snippet view article find links to article

prominence in recent years. Extinction, Extension: A New Slice of the Geologic Record (2023), exhibited at the Guangzhou Triennial in 2023, deployed large

Climate and vegetation interactions in the Arctic (2,674 words) [view diff] case mismatch in snippet view article find links to article

environmental change. National Research Council (U.S.). Committee on the Geologic Record of Biosphere Dynamics. Washington, D.C.: National Academies Press.

Dinosterol (3,460 words) [view diff] exact match in snippet view article find links to article

be related back to their parent sterols and are more stable in the geologic record. The preservation of sterols is often limited, but is enhanced by anaerobic

2018 in paleontology (40,494 words) [view diff] exact match in snippet view article find links to article

000 years, is presented by Yokoyama et al. (2018). A study on the geologic record of Milankovitch climate cycles, extending their analysis into the Proterozoic

Michael R. Rampino (3,861 words) [view diff] exact match in snippet view article find links to article

Rampino proposed the radical idea that some “glacial” deposits in the geologic record are actually impact-related debris flows. Rampino has investigated

Paquier Event (2,224 words) [view diff] exact match in snippet view article find links to article

carbonate production. As with other OAEs, OAE1b left its mark on the geologic record in the form of widespread and abundant deposition of black shales.

Jay Quade (1,430 words) [view diff] exact match in snippet view article find links to article

Jason A.; Quade, Jay; Bright, Jordon (2014). "Desert wetlands in the geologic record". Earth-Science Reviews. 132: 67–81. Bibcode:2014ESRv..132...67P. doi:10

Hirnantian Isotopic Carbon Excursion (1,731 words) [view diff] exact match in snippet view article find links to article

current official timing of the Hirnantian, and thus the HICE, in the geologic record according to the International Commission on Stratigraphy is 445.2

Sulfur isotope biogeochemistry (8,512 words) [view diff] exact match in snippet view article find links to article

processes and the environments where they occurred. δ34S values in the geologic record have been inferred to reveal the history of microbial sulfate reduction

Ceratioidei (3,015 words) [view diff] exact match in snippet view article find links to article

inhabit, fossil remains of deep-sea anglerfishes are very rare in the geologic record. Only a few formations worldwide preserve them, which tend to have