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Centemodon
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Centemodon (meaning "point tooth") is an extinct genus of basal phytosaur from the Late Triassic Period. It lived in what is now Pennsylvania, United StatesCompsosaurus (173 words) [view diff] no match in snippet view article find links to article
Compsosaurus (meaning "elegant lizard") is an extinct genus of phytosaur, a crocodile-like reptile that lived during the Triassic. Its fossils have beenSuchoprion (166 words) [view diff] no match in snippet view article find links to article
Suchoprion is a dubious genus of phytosaurian archosaur known from poor remains from the Late Triassic of North America. It was once thought to be a theropodFedexia (1,097 words) [view diff] no match in snippet view article find links to article
Fedexia is an extinct genus of carnivorous temnospondyl within the family Trematopidae. It lived 300 million years ago during the late Carboniferous periodGwyneddosaurus (400 words) [view diff] no match in snippet view article find links to article
Gwyneddosaurus is a possibly invalid genus of extinct aquatic tanystropheid reptile. The type species, G. erici was described in 1945 by Wilhelm Bock,Keyser Formation (778 words) [view diff] no match in snippet view article find links to article
The Late Silurian to Early Devonian Keyser Formation is a mapped limestone bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia. The KeyserPottsville Formation (767 words) [view diff] no match in snippet view article find links to article
The Pennsylvanian Pottsville Formation is a mapped bedrock unit in Pennsylvania, western Maryland, West Virginia, Ohio, and Alabama. It is a major ridge-formerJava Formation (94 words) [view diff] no match in snippet view article find links to article
The Java Formation is a geologic formation in Kentucky, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia. It preserves fossils dating backDesmatodon (277 words) [view diff] no match in snippet view article find links to article
Desmatodon is an extinct genus of diadectid reptiliomorph. With fossils found from the Kasimovian (Missourian) stage of the Late Carboniferous of PennsylvaniaBerea Sandstone (1,065 words) [view diff] no match in snippet view article find links to article
Berea Sandstone, also known as Berea Grit, is a sandstone formation in the U.S. states of Michigan, Ohio, Pennsylvania, West Virginia, and Kentucky. ItConemaugh Group (58 words) [view diff] no match in snippet view article find links to article
The Conemaugh Group is a geologic group in West Virginia, Pennsylvania, Ohio, and Maryland. It preserves fossils dating back to the Carboniferous periodNeedmore Shale (225 words) [view diff] no match in snippet view article find links to article
The Devonian Needmore Formation or Needmore Shale is a mapped bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia. The Needmore FormationConococheague Formation (383 words) [view diff] no match in snippet view article find links to article
The Conococheague Formation is a mapped Appalachian bedrock unit of Cambrian age, consisting primarily of limestone and dolomite. It occurs in centralHarrell Shale (314 words) [view diff] no match in snippet view article find links to article
The Devonian Harrell Formation is a mapped bedrock unit in Pennsylvania, Maryland, West Virginia, and Virginia. The Harrell Formation was first describedRose Hill Formation (130 words) [view diff] no match in snippet view article find links to article
The Rose Hill Formation is a geologic formation in West Virginia, United States. This formation dates back to the Silurian period, and is a source of ironWashington Formation (238 words) [view diff] no match in snippet view article find links to article
The Washington Formation is a coal, sandstone, and limestone geologic formation located in Ohio, Pennsylvania and West Virginia. It dates back to the LowerCatskill Group (515 words) [view diff] no match in snippet view article find links to article
The Devonian Catskill Group or the Catskill Clastic wedge is a unit of mostly terrestrial sedimentary rock found in Pennsylvania and New York. Minor marineAntietam Formation (121 words) [view diff] no match in snippet view article find links to article
The Antietam Formation or Antietam Sandstone is a geologic formation in Pennsylvania, Maryland and West Virginia. It is largely quartz sandstone with someTomstown Dolomite (138 words) [view diff] no match in snippet view article find links to article
The Tomstown Dolomite or Tomstown Formation is a geologic formation in Maryland, Pennsylvania, Virginia and West Virginia. It preserves fossils datingForeknobs Formation (379 words) [view diff] no match in snippet view article find links to article
The Devonian Foreknobs Formation is a mapped bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia. The Foreknobs Formation contains massiveUtica Shale (1,286 words) [view diff] no match in snippet view article find links to article
The Utica Shale is a stratigraphical unit of Upper Ordovician age in the Appalachian Basin. It underlies much of the northeastern United States and adjacentScherr Formation (458 words) [view diff] no match in snippet view article find links to article
The Devonian Scherr Formation is a mapped bedrock unit in Pennsylvania, Maryland, Virginia and West Virginia. The Scherr Formation consists predominantlyDunkard Group (294 words) [view diff] no match in snippet view article find links to article
The Permian Dunkard Group (Pd) is an area of rock, Early Permian in age, in the south of Ohio, southwestern Pennsylvania, West Virginia and the hilltopsBrallier Formation (348 words) [view diff] no match in snippet view article find links to article
devonian portal The Devonian Brallier Formation is a mapped bedrock unit in Pennsylvania, Maryland, West Virginia, and Virginia. The Brallier FormationKinzers Formation (357 words) [view diff] no match in snippet view article find links to article
The Kinzers Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Cambrian Period. The base of the Kinzers FormationHamilton Group (1,281 words) [view diff] no match in snippet view article find links to article
The Hamilton Group is a Devonian-age geological group which is located in the Appalachian region of the United States. It is present in New York, PennsylvaniaHuntersville Chert (454 words) [view diff] no match in snippet view article find links to article
The Huntersville Chert or Huntersville Formation is a Devonian geologic formation in the Appalachian region of the United States. It is primarily composedAllegheny Group (1,772 words) [view diff] exact match in snippet view article find links to article
Pennsylvanian Essex Fauna of Illinois. Fieldiana Geology 12:157-169 The Geology of Pennsylvania, C. H. Shultz, ed., DCNR Special Publication 1, 1999. (Ch. 10)Onondaga Limestone (1,332 words) [view diff] no match in snippet view article find links to article
The Onondaga Limestone is a group of hard limestones and dolomites of Devonian age that forms geographic features in some areas in which it outcrops; inChazy Formation (623 words) [view diff] no match in snippet view article find links to article
The Chazy Reef Formation is a mid-Ordovician limestone deposit in northeastern North America. It consists of some of the oldest reef systems built by aRidgeley Sandstone (674 words) [view diff] no match in snippet view article find links to article
The Ridgeley sandstone is a sandstone or quartzite of Devonian age found in the Appalachian Mountains of Pennsylvania, Maryland, West Virginia, and VirginiaCussewago Formation (54 words) [view diff] no match in snippet view article find links to article
The Cussewago Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Devonian period. Earth sciences portal PennsylvaniaKittatinny Formation (545 words) [view diff] no match in snippet view article find links to article
The Ordovician Kittatinny Formation or Kittatinny Limestone is a dolomitic limestone formation in New Jersey. The Kittatinny Limestones are located primarilyWarrior Formation (246 words) [view diff] no match in snippet view article find links to article
The Cambrian Warrior Formation is a mapped limestone bedrock unit in Pennsylvania. The Warrior Formation is described by Berg and others as gray, thin-New Oxford Formation (592 words) [view diff] no match in snippet view article find links to article
The New Oxford Formation is a mapped bedrock unit consisting primarily of sandstones, conglomerates, and shales. The New Oxford Formation was first describedDoswell Formation (1,537 words) [view diff] no match in snippet view article find links to article
The Doswell Formation (also known as the Doswell Group) is a geologic unit of Upper Triassic age, part of the Newark Supergroup. The Doswell FormationGettysburg Formation (746 words) [view diff] exact match in snippet view article find links to article
tectonics—Early Mesozoic—sedimentary rocks, in Shultz, C. H., ed., The geology of Pennsylvania: Pennsylvania Geological Survey, 4th series, Special PublicationWills Mountain (598 words) [view diff] exact match in snippet view article find links to article
/ 39.93983; -78.6517. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press. pp. viii+ 352. United StatesVirgilian series (157 words) [view diff] no match in snippet view article find links to article
The Virgilian series is the youngest part of the Pennsylvanian epoch in the North American geologic classification series. During Virgilian times, theHenry Darwin Rogers (1,251 words) [view diff] exact match in snippet view article find links to article
August 1808 – 26 May 1866) was an American geologist. His book, The Geology of Pennsylvania: A Government Survey (1858), was regarded as one of the most importantMifflintown Formation (102 words) [view diff] no match in snippet view article find links to article
The Mifflintown Formation is a geologic formation in Maryland, Pennsylvania, and Virginia. It preserves fossils dating back to the Silurian period. TheHardyston Quartzite (541 words) [view diff] no match in snippet view article find links to article
The Cambrian Hardyston Formation or Hardyston Quartzite is a mapped bedrock unit in Pennsylvania and New Jersey. It was originally described by Wolff andBedford Shale (6,124 words) [view diff] no match in snippet view article find links to article
Devonian portal The Bedford Shale is a shale geologic formation in the states of Ohio, Michigan, Pennsylvania, Kentucky, West Virginia, and Virginia inPittsburgh coal seam (2,567 words) [view diff] no match in snippet view article find links to article
The Pittsburgh coal seam is the thickest and most extensive coal bed in the Appalachian Basin; hence, it is the most economically important coal bed inAmes Limestone (109 words) [view diff] no match in snippet view article find links to article
The Ames Limestone is a geologic formation in Ohio, Kentucky, Pennsylvania and West Virginia. It is part of the Conemaugh Group. Formerly know at "CrinoidalHammer Creek Formation (375 words) [view diff] no match in snippet view article find links to article
The Hammer Creek Formation is a mapped bedrock unit consisting primarily of conglomerate, coarse sandstone, and shale. The Hammer Creek Formation was originallyVintage Dolomite (166 words) [view diff] no match in snippet view article find links to article
The Vintage Dolomite is a geologic formation in Pennsylvania. It preserves fossils dating back to the Cambrian period. Named from exposures at a railroadLedger Formation (327 words) [view diff] no match in snippet view article find links to article
The Ledger Formation or Ledger Dolomite is a geologic formation in Pennsylvania, United States. The Ledger is described as light-gray, locally mottledConemaugh Formation (54 words) [view diff] no match in snippet view article find links to article
The Conemaugh Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Carboniferous period. Earth sciences portal PennsylvaniaConestoga Formation (60 words) [view diff] no match in snippet view article find links to article
The Conestoga Formation is a geologic formation in Pennsylvania. Light-gray, thin-bedded, impure, contorted limestone having shale partings; conglomeraticVenango Formation (54 words) [view diff] no match in snippet view article find links to article
The Venango Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Devonian period. Earth sciences portal PennsylvaniaMachias Formation (54 words) [view diff] no match in snippet view article find links to article
The Machias Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Devonian period. Earth sciences portal PennsylvaniaRushford Formation (54 words) [view diff] no match in snippet view article find links to article
The Rushford Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Devonian period. Earth sciences portal PennsylvaniaGatesburg Formation (147 words) [view diff] no match in snippet view article find links to article
The Gatesburg Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Cambrian period. The formation is described byPleasant Hill Limestone (55 words) [view diff] no match in snippet view article find links to article
The Pleasant Hill Limestone is a geologic formation in Pennsylvania. It preserves fossils dating back to the Cambrian period. Earth sciences portal PennsylvaniaJennings Formation (81 words) [view diff] no match in snippet view article find links to article
The Jennings Formation is a geologic formation in Maryland. It preserves fossils dating back to the Devonian period. Earth sciences portal Maryland portalDelaware River Formation (59 words) [view diff] no match in snippet view article find links to article
The Delaware River Formation is a geologic formation in Pennsylvania and New York (state). It preserves fossils dating back to the Devonian period. EarthLockport Group (260 words) [view diff] no match in snippet view article find links to article
The Lockport Group is a geologic group in the Appalachian Basin and Michigan Basin in the northeastern United States and Canada. This unit makes up theMercer Formation (54 words) [view diff] no match in snippet view article find links to article
The Mercer Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Carboniferous period. Earth sciences portal PennsylvaniaCuba Formation (92 words) [view diff] no match in snippet view article find links to article
The Cuba Formation is a geologic formation in New York (state) and Pennsylvania[citation needed]. It preserves fossils[citation needed] dating back toDuquesne Coal (54 words) [view diff] no match in snippet view article find links to article
The Duquesne Coal is a geologic formation in Pennsylvania. It preserves fossils dating back to the Carboniferous period. Earth sciences portal PennsylvaniaOld Point Formation (55 words) [view diff] no match in snippet view article find links to article
The Old Point Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Devonian period. Earth sciences portal PennsylvaniaOswayo Sandstone (54 words) [view diff] no match in snippet view article find links to article
The Oswayo Sandstone is a geologic formation in Pennsylvania. It preserves fossils dating back to the Devonian period. Earth sciences portal PennsylvaniaHammersley Wild Area (1,400 words) [view diff] exact match in snippet view article find links to article
Retrieved 2009-05-01. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press Publishing Company. p. 115.Red Rock Mountain (173 words) [view diff] exact match in snippet view article find links to article
Geological Survey of Pennsylvania Charles H. Shultz (1999) "The Geology of Pennsylvania", Geological Survey of Pennsylvania ISBN 0-8182-0227-0 "Red RockCherry Ridge Shale (55 words) [view diff] no match in snippet view article find links to article
The Cherry Ridge Shale is a geologic formation in Pennsylvania. It preserves fossils dating back to the Devonian period. Earth sciences portal PennsylvaniaButler Knob (190 words) [view diff] exact match in snippet view article find links to article
Geological Survey of Pennsylvania Charles H. Shultz (1999) "The Geology of Pennsylvania", Geological Survey of Pennsylvania ISBN 0-8182-0227-0 RothrockBig Mountain (Pennsylvania) (365 words) [view diff] exact match in snippet view article
Geological Survey of Pennsylvania Charles H. Shultz (1999) "The Geology of Pennsylvania", Geological Survey of Pennsylvania ISBN 0-8182-0227-0 "TuscaroraRhinestreet Formation (212 words) [view diff] no match in snippet view article find links to article
The Rhinestreet Shale is a geologic formation in the Appalachian Basin. It dates back to the Devonian period. The Rhinestreet is an organic or Black ShaleBlue Knob (Pennsylvania) (1,088 words) [view diff] exact match in snippet view article
Geological Survey of Pennsylvania Charles H. Shultz (1999) "The Geology of Pennsylvania", Geological Survey of Pennsylvania ISBN 0-8182-0227-0 Jere MartinGenesee Formation (848 words) [view diff] no match in snippet view article find links to article
The Genesee Formation (Group) is a geologic formation in New York. It is equivalent the Harrell Shale in Pennsylvania. It date back to the Upper DevonianLittle Pine State Park (3,554 words) [view diff] exact match in snippet view article find links to article
p. 167. OCLC 17150333. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press Publishing Company. pp. 31–35McCauley Mountain (Pennsylvania) (1,276 words) [view diff] exact match in snippet view article
Mountain, retrieved December 12, 2014 Henry Darwin Rogers (1858), The Geology of Pennsylvania: A Government Survey, vol. 2, p. 264 The Pennsylvania Science OfficeGlaciated Allegheny Plateau (345 words) [view diff] exact match in snippet view article find links to article
Science Reviews. vol. 5, pp. 183-196. Fleeger, G., nd, Glacial geology of Pennsylvania Bureau of Topographic and Geologic Survey, Pennsylvania DepartmentSalina Group (1,300 words) [view diff] no match in snippet view article find links to article
The Salina Group or Salina Formation is a Late Silurian-age, Stratigraphic unit of sedimentary rock that is found in Northeastern and Midwestern NorthLaurel Hill (Pennsylvania) (917 words) [view diff] exact match in snippet view article
Geological Survey of Pennsylvania Charles H. Shultz (1999) The Geology of Pennsylvania, Geological Survey of Pennsylvania ISBN 0-8182-0227-0 Jere MartinKnox Supergroup (1,220 words) [view diff] no match in snippet view article find links to article
The Knox Supergroup, also known as the Knox Group and the Knox Formation, is a widespread geologic group in the Southeastern United States. The age isUpper Pine Bottom State Park (6,084 words) [view diff] exact match in snippet view article find links to article
p. 167. OCLC 17150333. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press Publishing Company. pp. 31–35Nittany Arch (156 words) [view diff] exact match in snippet view article find links to article
Mountain Nittany Mountain VanDiver, Bradford B. (1990). Roadside geology of Pennsylvania. Missoula, Mont: Mountain Press Pub. Co. p. 235. ISBN 0-87842-227-7Black Moshannon State Park (7,125 words) [view diff] exact match in snippet view article find links to article
Resources. OCLC 17150333. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press Publishing Company. p. 83. ISBN 0-87842-227-7Worlds End State Park (7,479 words) [view diff] exact match in snippet view article find links to article
Resources. OCLC 17150333. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press Publishing Company. p. 83. ISBN 0-87842-227-7Tangascootack Creek (2,739 words) [view diff] exact match in snippet view article find links to article
Pennsylvania. Board of Commissioners (1895), A Summary Description of the Geology of Pennsylvania: pt. 1. Carboniferous formation, p. 2201 Peter Wenrick SheaferGanoga Lake (5,597 words) [view diff] exact match in snippet view article find links to article
Retrieved July 16, 2012. Shultz, Charles H., ed. (1999). The Geology of Pennsylvania. Harrisburg and Pittsburgh, Pennsylvania: Pennsylvania GeologicalCherry Springs State Park (9,009 words) [view diff] exact match in snippet view article find links to article
Retrieved October 20, 2018. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press Publishing Company. p. 115.Long Run (Cranberry Creek tributary) (518 words) [view diff] exact match in snippet view article
July 25, 1913, Part 10, p. 41 Henry Darwin Rogers (1858), The Geology of Pennsylvania: A Government Survey, Volume 2, p. 235 Geological Survey of PennsylvaniaLeonard Harrison State Park (9,059 words) [view diff] exact match in snippet view article find links to article
36. ISBN 0-9635905-0-2. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press Publishing Company. pp. 31–35Colton Point State Park (9,584 words) [view diff] exact match in snippet view article find links to article
36. ISBN 0-9635905-0-2. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press Publishing Company. pp. 31–35Ricketts Glen State Park (11,956 words) [view diff] exact match in snippet view article find links to article
Resources. OCLC 17150333. Shultz, Charles H., ed. (1999). The Geology of Pennsylvania. Harrisburg and Pittsburgh, Pennsylvania: Pennsylvania GeologicalLarrys Creek (6,858 words) [view diff] exact match in snippet view article find links to article
Retrieved 2008-02-28. Van Diver, Bradford B. (1990). Roadside Geology of Pennsylvania. Missoula, Montana: Mountain Press Publishing Company. p. 83. ISBN 0-87842-227-7Waterfalls in Ricketts Glen State Park (6,289 words) [view diff] exact match in snippet view article find links to article
Commission. ISBN 0-271-02213-2. Shultz, Charles H., ed. (1999). The Geology of Pennsylvania. Harrisburg and Pittsburgh, Pennsylvania: Pennsylvania GeologicalFurnace Run (Shamokin Creek tributary) (1,109 words) [view diff] exact match in snippet view article
Run, retrieved August 14, 2015 Henry Darwin Rogers (1858), The Geology of Pennsylvania: A Government Survey, Volume 2, p. 296 J.J. John (1891), HistoryKeyser Creek (2,366 words) [view diff] exact match in snippet view article find links to article
tributaries of the Lackawanna River Henry Darwin Rogers (1858), The Geology of Pennsylvania: A Government Survey, Volume 2, pp. 337, 345 United States GeologicalWhite Oak Run (Lackawanna River tributary) (1,415 words) [view diff] exact match in snippet view article
Retrieved May 18, 2015. Geological Survey of Pennsylvania (1858). The geology of Pennsylvania: a government survey: with a general view of the geology of theCoal Run (Shamokin Creek tributary) (1,599 words) [view diff] exact match in snippet view article
17, 2015[permanent dead link] Henry Darwin Rogers (1858), The Geology of Pennsylvania: A Government Survey, Volume 2, retrieved August 17, 2015 "ACTIONSEast Branch Chillisquaque Creek (1,751 words) [view diff] exact match in snippet view article find links to article
Pennsylvania, Board of Commissioners (1892), A Summary Description of the Geology of Pennsylvania: Upper Silurian and Devonian formations, p. [page needed]{{citation}}:North Branch Shamokin Creek (1,886 words) [view diff] exact match in snippet view article find links to article
Creek, retrieved August 20, 2015 Henry Darwin Rogers (1858), The Geology of Pennsylvania: A Government Survey, Volume 2, pp. 289, 301–302, 305 Eli BowenRacket Brook (1,663 words) [view diff] exact match in snippet view article find links to article
Brook, retrieved June 1, 2015 Henry Darwin Rogers (1858), The Geology of Pennsylvania: A Government Survey, Volume 2, p. 331, retrieved June 2, 2015Carbon Run (2,168 words) [view diff] exact match in snippet view article find links to article
7, retrieved August 16, 2015 Henry Darwin Rogers (1858), The Geology of Pennsylvania: A Government Survey, Volume 2, pp. 287, 306, retrieved AugustStafford Meadow Brook (3,084 words) [view diff] exact match in snippet view article find links to article
time", retrieved April 1, 2015 Henry Darwin Rogers (1858), The Geology of Pennsylvania: A Government Survey, Volume 2, pp. 346, 357 Stormwater managementCoal mining in Plymouth, Pennsylvania (8,986 words) [view diff] exact match in snippet view article find links to article
Wilkes-Barre Times Leader, January 27, 1915. Henry Darwin Rogers, The Geology of Pennsylvania, vol. 2 (Philadelphia: J.B. Lippincott & Co., 1858) Lemuel Amerman