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searching for Silicification 51 found (139 total)

Petrified wood (3,167 words) [view diff] exact match in snippet view article find links to article

decomposes, so that cell walls are often preserved in great detail. Thus silicification begins within the cell walls, and the spaces within and between cells

Elso Barghoorn (988 words) [view diff] exact match in snippet view article find links to article

PMC 432792. PMID 16592257. Leo, Richard F.; Barghoorn, Elso S. (1976). "Silicification of Wood". Botanical Museum Leaflets, Harvard University. 25 (1): 1–47

Thalassiosira pseudonana (1,691 words) [view diff] exact match in snippet view article find links to article

diameter. Their cell walls have been reported to mostly have low degree of silicification; however, their rims and ribs are highly silicified. This probably enables

Limestone (8,485 words) [view diff] exact match in snippet view article find links to article

the sediments. Silicification occurs early in diagenesis, at low pH and temperature, and contributes to fossil preservation. Silicification takes place through

Riesenstein (Wolfershausen) (862 words) [view diff] exact match in snippet view article

sandstones in a tropical climate. This entailed bleaching of sandstone and silicification by movement of silica-saturated groundwater through the strata. Consequently

Tor Formation (130 words) [view diff] exact match in snippet view article find links to article

Bjerrum, C.J.; Stemmerik, L. (2020). "Stratigraphically controlled silicification in Danian chalk and its implications for reservoir properties, southern

Agathoxylon (1,696 words) [view diff] exact match in snippet view article find links to article

(Late Pennsylvanian, Bohemian Massif, Czech Republic): Systematics, silicification and palaeoenvironment". Neues Jahrbuch für Geologie und Paläontologie

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

(September 2015). "Fossil preservation through phosphatization and silicification in the Ediacaran Doushantuo Formation (South China): a comparative synthesis"

Peneplain (1,736 words) [view diff] exact match in snippet view article find links to article

period" of weathering under non-glacial conditions may be a requirement. Silicification of peneplain surfaces exposed to sub-tropical and tropical climate for

Paleovirology (639 words) [view diff] exact match in snippet view article find links to article

Paleogenetics Viral eukaryogenesis Laidler, J.R.; Stedman, K.M. (2010). "Virus Silicification under Simulated Hot Spring Conditions". Astrobiology. 10 (6): 569–576

Greisen (781 words) [view diff] exact match in snippet view article find links to article

most fluids escaping. This sealing is largely due to hornfelsing and silicification of the overlying rocks, and fracturing of these rock typically forms

Intra-volcanic sedimentary rock in North Ethiopia (697 words) [view diff] exact match in snippet view article find links to article

gastropods themselves, particularly their faeces, have contributed to the silicification, more in particular to the formation of pelletoidal wackestone, that

Saint-Martin-le-Pin (611 words) [view diff] exact match in snippet view article find links to article

village. Associated with the ores is an intensive recrystallization and silicification of the country rocks along the fault line. Between 1825 and 1850 manganese

Baryte (2,232 words) [view diff] exact match in snippet view article find links to article

Hanor, J. S. (September 1987). "Origin and timing of the metasomatic silicification of an early Archaean komatiite sequence, Barberton Mountain Land, South

Carya washingtonensis (655 words) [view diff] exact match in snippet view article find links to article

(0.55–0.75 in) in width. While the preservation quality varies, the silicification in a number of the specimens was enough to allow examination of the

Ekofisk Formation (133 words) [view diff] exact match in snippet view article find links to article

Bjerrum, C.J.; Stemmerik, L. (2020). "Stratigraphically controlled silicification in Danian chalk and its implications for reservoir properties, southern

Paleontology in West Virginia (1,717 words) [view diff] exact match in snippet view article find links to article

Devonian West Virginia was home to corals, whose remains fossilized by silicification. During the Late Devonian the state's seas had begun filling in with

Hajigak mining concession (1,707 words) [view diff] exact match in snippet view article find links to article

has been observed within the host rocks, and includes sericitisation, silicification and carbonisation. Iron occurrences were observed during initial geological

Kaibab Limestone (1,841 words) [view diff] exact match in snippet view article find links to article

composition variation by the alteration of limestone to dolomite and the silicification of limestone to form chert. In the western Grand Canyon region, the

Burgess Shale-type preservation (4,584 words) [view diff] exact match in snippet view article find links to article

30 August 1909, hypothesised that the organic material was preserved by silicification. When the shale was redescribed in the 1970s, it was possible to take

Tuff (4,848 words) [view diff] exact match in snippet view article find links to article

similar tuffs are known, but in all cases, they are greatly changed by silicification (which has filled them with opal, chalcedony, and quartz) and by devitrification

Ediacaran type preservation (1,382 words) [view diff] exact match in snippet view article find links to article

preservational mode into the Cambrian and its increasing scarcity thereafter, is silicification: this links the preservation of the fossils to the higher silica content

Ceramic engineering (7,565 words) [view diff] exact match in snippet view article find links to article

Lenses Infrared heat-seeking devices Heat shield Exhaust heat management Silicification is quite common in the biological world and occurs in bacteria, single-celled

Fruta del Norte mine (389 words) [view diff] exact match in snippet view article find links to article

(Aurelian Exploration Manager Steve Leary) and the observation that some silicification of these basin sediments had occurred at Fruta del Norte by geologist

Richat Structure (2,372 words) [view diff] exact match in snippet view article find links to article

dissolution. The resulting fluids were also responsible for subsequent silicification and hydrothermal infilling. To the best of our knowledge, karst collapse

Bob Williams (chemist) (1,449 words) [view diff] exact match in snippet view article

University of Oxford. OCLC 944386301. Perry, Carole Celia (1985). Silicification in biological systems. ox.ac.uk (DPhil thesis). University of Oxford

Turgor pressure (3,569 words) [view diff] exact match in snippet view article find links to article

2017. Raven, J. A.; Waite, A. M. (1 April 2004). "The evolution of silicification in diatoms: inescapable sinking and sinking as escape?". New Phytologist

Anya Waite (442 words) [view diff] exact match in snippet view article find links to article

1016/j.dsr2.2006.12.008. Raven, JA; Waite, AM (2004). "The evolution of silicification in diatoms: Inescapable sinking and sinking as escape?". New Phytologist

Lepidocaris (811 words) [view diff] exact match in snippet view article find links to article

Nigel H Trewin, Stephen R Fayers & Ruth Kelman (2003). "Subaqueous silicification of the contents of small ponds in an Early Devonian hot-spring complex

Devil's Table (Hinterweidenthal) (734 words) [view diff] exact match in snippet view article

environment. The fine-grained “thin layers“ on the other hand show no silicification and indicate a deposition in stagnant water. These layers were deposited

Robocasting (1,929 words) [view diff] exact match in snippet view article find links to article

Eric B.; Shepherd, Robert F.; Lewis, Jennifer A. (2006). "Biomimetic silicification of 3D polyamine-rich scaffolds assembled by direct ink writing". Soft

Jim Laidler (801 words) [view diff] exact match in snippet view article find links to article

Retrieved 8 October 2013. Laidler, J. R.; Stedman, K. M. (2010). "Virus Silicification under Simulated Hot Spring Conditions". Astrobiology. 10 (6): 569–576

Radiolarite (2,513 words) [view diff] exact match in snippet view article find links to article

from radiolarian-rich limestone layers which subsequently underwent silicification. Similar sediments in Greece incorporate layers with calcareous turbidites

Fontainebleau rock climbing (1,198 words) [view diff] exact match in snippet view article find links to article

Their appearance may have been accentuated by localised mineralisation (silicification) of the sandstone rock, forming large nodules. Two complementary grading

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

though its silica content of 77-80% likely reflects some secondary silicification. It contains 10-20% quartz and alkali feldspar phenocrysts. Rare occurrences

Volcanogenic massive sulfide ore deposit (2,537 words) [view diff] exact match in snippet view article find links to article

nearly all examples, consisting of sericite +/- chlorite +/- silica, Silicification zone, often gradational with background silica-albite metasomatism.

Auger electron spectroscopy (4,117 words) [view diff] exact match in snippet view article find links to article

doi:10.1149/1.2667428. Mingjie Xu; et al. (March 2006). "Biomimetic silicification of 3D polyamine-rich scaffolds assembled by direct ink writing". Soft

Rhynie chert (3,575 words) [view diff] exact match in snippet view article find links to article

PMID 9243014. Trewin, N.H.; Fayers, S.R.; Kelman, R. (2003). "Subaqueous silicification of the contents of small ponds in an Early Devonian hot-spring complex

Silicon isotope biogeochemistry (2,518 words) [view diff] exact match in snippet view article find links to article

Archean the dominant sources of Si sediments were weathering, erosion, silicification of clastic sediments or hydrothermal activity, in contrast to the vast

Buena Vista Mine, Nevada (925 words) [view diff] exact match in snippet view article find links to article

sheeted dike swarms. The deposition of iron was not associated with silicification or sulfidation. Host rocks contain veins and large accumulations of

El Tatio (12,355 words) [view diff] exact match in snippet view article find links to article

Kurt O.; Grandin, Prisca; Zuilen, Mark A. van (2021). "Evaporative silicification in floating microbial mats: patterns of oxygen production and preservation

Francevillian B Formation (995 words) [view diff] exact match in snippet view article find links to article

the first episode of the oil migration being synchronous along with a silicification event that derived into a hot and low salinity fluid which is proven

Antofalla (4,740 words) [view diff] exact match in snippet view article find links to article

the margin of a restricted epeiric sea: Insights into strata-confined silicification in mixed siliciclastic‑carbonate successions". Palaeogeography, Palaeoclimatology

Allenby Formation (4,479 words) [view diff] exact match in snippet view article find links to article

Princeton chert biota is unique in the Allenby formation due to the silicification of the chert, which has resulted in cellular and anatomical preservation

Pignola-Abriola stratigraphic section (1,933 words) [view diff] exact match in snippet view article find links to article

siliciclastic fraction becomes more abundant in the upper part (as well as the silicification of the limestones). This increment of terrigenous input in the basin

Paleocene–Eocene Thermal Maximum (19,183 words) [view diff] exact match in snippet view article find links to article

Pascher KM, Dickens GR, Hull PM (1 January 2023). "Radiolarian size and silicification across the Paleocene-Eocene boundary and into the early Eocene". Palaeogeography

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

"Causes and biogeochemical implications of regional differences in silicification of marine diatoms". Global Biogeochemical Cycles. 24 (4): n/a. Bibcode:2010GBioC

Protists in the fossil record (7,729 words) [view diff] exact match in snippet view article find links to article

were unsilicified and their evolution was cryptic. Since the advent of silicification, diatoms have made a significant impression on the fossil record, with

Ditton, Kent (8,181 words) [view diff] exact match in snippet view article find links to article

and lateral facies. The facies are glauconitic with some horizons of silicification. Shell debris (ammonites, belemnites, nautiloids, bivalves, etc.) and

Calcare di Aurisina (2,471 words) [view diff] exact match in snippet view article find links to article

tidal channels, and rudist accumulations The complex dolomitization and silicification in the region may be linked to a Monsoon climate with alternating wet

Úrkút Manganese Ore Formation (3,820 words) [view diff] exact match in snippet view article find links to article

Special issue (pp. 11–21). Vámos, R. (1969). Microbiological processes of silicification of the fossil trunks found in Liassic manganese ore: With 3 figures