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Mapped bedrock in the United States
Harrell Shale consists of very dark gray, thinly laminated, platy- to sheety-weathering shale underlain in certain areas by the grayish black shale of
Harrell_Shale
The Burket Shale or Geneseo Shale is the lowest member of the Harrell Shale/Genessee Group. The Burket is an organic-rich black shale that rests just above
Burket_Shale
Stratigraphical unit of Upper Ordovician age in the Appalachian Basin
The Utica Shale is a stratigraphic unit of Upper Ordovician age in the Appalachian Basin. It underlies much of the northeastern United States and adjacent
Utica_Shale
Middle Devonian age unit of sedimentary rock
depositional sequences formed the overlying Brallier Formation and Harrell Formation. The shale contains largely untapped natural gas reserves, and its proximity
Marcellus_Formation
Devonian geologic unit in the Appalachian basin
Formation (Group) is a geologic formation in New York. It is equivalent the Harrell Shale in Pennsylvania. It dates back to the Upper Devonian period. It is the
Genesee_Formation
Geologic formation in West Virginia, Pennsylvania, and Ohio, United States
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Monongahela_Formation
Geologic formation in Ohio
The Ohio Shale is a geologic formation in Ohio. It preserves fossils dating back to the Devonian period. Earth sciences portal Ohio portal Paleontology
Ohio_Shale
Widespread shallow marine limestone
limestone. The formation is composed of thin interbedded wackestone and shale. This formation can be organic rich in parts and sub surface is dark grey
Trenton_Group
Widespread geologic group in the Southeastern United States
Facies-defining cycles are divided into grainy carbonate, muddy carbonate, sandstone, shale, and Stromatolitic–Algal mat Boundstones. Stromatolite reefs are a common
Knox_Supergroup
Hard limestones rock formation in North America
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Onondaga_Limestone
Geological formation in the United States
atop the Marcellus Formation shale. Its upper contact is also conformable to the Trimmers Rock Formation and Harrell Shale. In 2012, Read and Erikson reported
Mahantango_Formation
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Hampshire_Group
Geologic group in the Appalachian Basin, U.S.
is shale. The Rhinestreet Member can be further subdivided into two shale types: a thick, fissile black shale underlies a gray to greenish-gray shale that
West_Falls_Group
Geological formation in the United States
The Bedford Shale is a shale geologic formation in the states of Ohio, Michigan, Pennsylvania, Kentucky, West Virginia, and Virginia in the United States
Bedford_Shale
Sandstone formation in the United States
each other. The sandstone overlies the Bedford Shale and the Ohio Shale and underlies the Sunbury Shale. Berea Sandstone is light gray to buff-colored
Berea_Sandstone
Geologic Group found in the Appalachian Basin
are the New Creek Limestone, the Corriganville Limestone, and the Mandata Shale. The total thickness is about 60 feet (18 m). The formations weather easily
Helderberg_Group_(geology)
Large Geologic Group
of the Salina. The Salina Formation is composed chiefly of dolomite and shale, interbedded with anhydrite, gypsum, and salt. Stratigraphically, the Salina
Salina_Group
Geologic formation in New York, United States
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Sodus_Formation
Geological formation in Ontario, Canada
Geologic Map Database. The formation comprises dolomites, limestones and shales and reaches a thickness of 495 feet (151 m) in the subsurface, while in
Bertie_Group
Geologic group in West Virginia, United States
Sonyea Formation Harrell Shale Genesee Formation Middle Givetian Tully Limestone Hamilton Group Eifelian Hamilton Group Marcellus Shale Onondaga Limestone
Conasauga_Group
Geologic formation in the United States
Sunbury Shale Coldwater Shale Rushville Shale D Upper Famennian Bedford Shale Berea Sandstone Cussewago Sandstone Ohio Shale Cleveland Shale Chagrin Shale Huron
Swift_Run_Formation
Geologic formation in Michigan, United States
The Sunbury Shale is a geologic formation in Michigan. It preserves fossils dating back to the Mississippian period. Earth sciences portal Michigan portal
Sunbury_Shale
Geologic group
Rye Point Shale, Rock Stream Formation ("Enfield Formation") Siltstone, Pulteney shale, Sawmill Creek Shale, Johns Creek Shale and Montour Shale. Pennsylvania
Sonyea_Formation
Geologic formation in the United States
unconformity. The Huntersville Chert is laterally equivalent to the Needmore Shale, which lies north of the New River. It is also laterally equivalent to a
Huntersville_Chert
Geologic group in Eastern and Midwestern, USA
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Black_River_Group
is the lowest unit of the Salina Group. It is made up of red and green shales, siltstone, dolomite, anhydrite and halite. It is made up of three distinct
Vernon_Formation
Geological Group in North America
Mahantango Formation. The Tully Limestone is succeeded by the dark laminated Harrell Shale. In 2012, Read and Erikson reported the group as dating from the Eifelian
Hamilton_Group
North American geological formation
bluffs of the Mississippi River valley beneath a very thin layer of Glenwood Shale and a much thicker layer of Platteville limestone. Examples can be seen
St._Peter_Sandstone
Geological formation in the United States
Chagrin Shale is a shale geologic formation in the eastern United States that is approximately 365 million years old. The Chagrin Shale is a gray shale that
Chagrin_Shale
Geologic formation in the United States
a history of oil production. Between each sandstone member are beds of shale and siltstone. Informal names for members of the Venango are derived from
Venango_Group
Geologic group in the eastern United States
Sonyea Formation Harrell Shale Genesee Formation Middle Givetian Tully Limestone Hamilton Group Eifelian Hamilton Group Marcellus Shale Onondaga Limestone
Conemaugh_Group
Geologic formation in the eastern US
the quartzite layers is conglomerate layers. White quartzite layers and shale beds between those layers can be found in many different layers. The Loudon
Catoctin_Formation
[[Silurian]] aged formation
formation as it nears the Rochester Formation thin greenish gray bed of shale maybe present. Reef knolls have been observed in the upper sections of the
Irondequoit_Formation
Bedrock unit in the Eastern United States
greenish-gray shale containing local limestone and sandstone zones, or more specifically as an olive to yellowish-gray, thin-bedded sandstone, calcareous shale, dolomite
Wills_Creek_Formation
Geologic formation in West Virginia
Sonyea Formation Harrell Shale Genesee Formation Middle Givetian Tully Limestone Hamilton Group Eifelian Hamilton Group Marcellus Shale Onondaga Limestone
Princeton_Sandstone
Geologic formation in the United States
, and Dennison, John M., 1978, STRATIGRAPHY OF THE DEVONIAN HARRELL AND MILLBORO SHALES IN PARTS OF PENNSYLVANIA, MARYLAND, WEST VIRGINIA, AND VIRGINIA
Brallier_Formation
Unit of sedimentary rock in the US
Wayback Machine Devonian Times Archived 2010-02-11 at the Wayback Machine Website summarize about Red Hill Shale in Catskill Formation Portal: Devonian
Catskill_Formation
Geologic formation in the United States
Tennessee, Virginia, West Virginia. In Virginia it is a member of Chattanooga Shale. It dates back to the Devonian period. The Java is made up of cyclical deposits
Java_Group
Bedford Shale Ohio Shale Brallier Formation Frasnian Brallier Formation Java Formation West Falls Formation Rhinestreet Sonyea Formation Harrell Shale Genesee
Price_Formation
Lithostratigraphic unit
ascending order, they are Denmar Limestone, Taggard Shale, Pickaway Limestone, Union Limestone, Greenville Shale, and Alderson Limestone. The limestones in this
Greenbrier_Group
Geologic Unit found in the Appalachian Basin
are also layers with much higher clay contend resulting in a calcareous shale. To the east the Tully becomes siliciclastic. This is due to sediments being
Tully_Formation
The Devonian Needmore Formation or Needmore Shale is a mapped bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia. The Needmore Formation
Needmore_Shale
Geologic formation in the United States
Sonyea Formation Harrell Shale Genesee Formation Middle Givetian Tully Limestone Hamilton Group Eifelian Hamilton Group Marcellus Shale Onondaga Limestone
Williamsport_Formation
Geologic formation in the United States
Rhinestreet Shale is a geologic formation in the Appalachian Basin. It dates back to the Devonian period. The Rhinestreet is an organic or Black Shale found
Rhinestreet_Formation
Geologic formation in West Virginia, United States
Bedford Shale Ohio Shale Brallier Formation Frasnian Brallier Formation Java Formation West Falls Formation Rhinestreet Sonyea Formation Harrell Shale Genesee
Oswego_Formation
Geologic formation in the United States
of the upper members of the Ludlowville. This unit is primarily made of shale, with some siltstone. It's thickness ranges from about 1.5' to 52', generally
Ludlowville_Formation
Geologic formation in the eastern United States
interbeds of shale and siltstone. And the Pen Argyl Member which is the uppermost slate unit with some minor phyllite and shale beds. The shales (and slates)
Martinsburg_Formation
Geologic formation in the United States
The Middlesex Formation is a carbon rich black shale geologic formation found in the Appalachian Basin. It represents one of several transgressive events
Middlesex_Formation
Sonyea Formation Harrell Shale Genesee Formation Middle Givetian Tully Limestone Hamilton Group Eifelian Hamilton Group Marcellus Shale Onondaga Limestone
Greenland_Gap_Group
Limestone bedrock unit in the Eastern United States
the Keyser is divided into Upper and Lower Members by the Big Mountain Shale Member. crinoid columnals stromatoporoids Brachiopods Tabulate corals Conodonts:
Keyser_Formation
Bedrock formation in the United States
defined as a grayish-red to greenish-gray, thin- to thick-bedded siltstone, shale, and very fine to medium-grained crossbedded sandstone or subgraywacke and
Juniata_Formation
Geologic formation
Sonyea Formation Harrell Shale Genesee Formation Middle Givetian Tully Limestone Hamilton Group Eifelian Hamilton Group Marcellus Shale Onondaga Limestone
New_River_Formation
Mapped unit of rock in North America
Clinton Group (also referred to as the Clinton Formation or the Clinton Shale) is a mapped unit of sedimentary rock found throughout eastern North America
Clinton_Group
Rock formation in the USA
maps. The Reedsville Formation is an olive-gray to dark-gray siltstone, shale, and fine-grained sandstone. In Central Pennsylvania along the Nittany Arch
Reedsville_Formation
Geologic formation in West Virginia, United States
microconchid. The Pride Shale Member has produced Tanypterichthys pridensis, an endemic species of deep-bodied palaeonisciform fish. The Pride Shale Member of the
Bluestone_Formation
represents a paleo-river delta containing sandstone as well as siltstone and shale. "Geolex — Cussewago". ngmdb.usgs.gov. Retrieved 2026-02-26. SCHINER, GEORGE
Cussewago_Formation
A carbonate unit in the Appalachian Basin and Cincinnati arch
equivalent to the Dutchtown Formation. In Michigan it correlates to the Glenwood Shale. While the Wells Creek is present in far western Pennsylvania it is equivalent
Wells_Creek_Dolomite
Geologic formation in Arkansas and Oklahoma, United States
Fayetteville Shale. The Fayetteville Shale is a geologic formation of Mississippian age (354–323 million years ago) composed of tight shale within the Arkoma
Fayetteville_Shale
American geologic formation
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Washington_Formation
Geological formation in Pennsylvania
Cambrian Period. The base of the Kinzers Formation is primarily a dark-brown shale. The middle is a gray and white spotted limestone and, locally, marble having
Kinzers_Formation
Geologic formation in Michigan
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Bois_Blanc_Formation
Carboniferous era eologic formation in West Virginia
Bedford Shale Ohio Shale Brallier Formation Frasnian Brallier Formation Java Formation West Falls Formation Rhinestreet Sonyea Formation Harrell Shale Genesee
Maccrady_Formation
Geologic group in West Virginia, United States
Sonyea Formation Harrell Shale Genesee Formation Middle Givetian Tully Limestone Hamilton Group Eifelian Hamilton Group Marcellus Shale Onondaga Limestone
St._Paul_Group
Geologic formation in the United States
Bedford Shale Ohio Shale Brallier Formation Frasnian Brallier Formation Java Formation West Falls Formation Rhinestreet Sonyea Formation Harrell Shale Genesee
Antietam_Formation
Pennsylvanian-age geological unit
Pennsylvanian sequence. The unit consists of cyclothemic sequences of coal, shale, limestone, sandstone, and clay. It contains six major coal zones, which
Allegheny_Group
Bedrock unit in Pennsylvania, Maryland, West Virginia, and Virginia, US
subgraywacke, sandstone, siltstone and shale, cross-stratified and conglomeratic conglomerate in parts, containing a few shale interbeds. Details of the type
Tuscarora_Sandstone
Geologic formation in the United States
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Schoharie_Formation
Geologic formation in Pennsylvania, United States
States. The Lock Haven is gray to green-brown sandstone, siltstone, and shale and is over 400 million years old. It is located in northcentral Pennsylvania
Lock_Haven_Formation
Geologic group in West Virginia, United States
Sonyea Formation Harrell Shale Genesee Formation Middle Givetian Tully Limestone Hamilton Group Eifelian Hamilton Group Marcellus Shale Onondaga Limestone
Rome_Group
Geologic formation in West Virginia, United States
first named by Campbell (1896). At the time it was called the "Bluefield Shale". Reger & Price (1926) later renamed it to the Bluefield Group and supplied
Bluefield_Formation
Geologic formation in the United States
Pennsylvania, Virginia, and West Virginia, consisting of schist, phyllite, and shale. It dates back to the early Cambrian period. It is considered part of the
Harpers_Formation
Pennsylvania Geologic Formation
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Bellefonte_Formation
Geological formation in West Virginia, US
Sonyea Formation Harrell Shale Genesee Formation Middle Givetian Tully Limestone Hamilton Group Eifelian Hamilton Group Marcellus Shale Onondaga Limestone
Kanawha_Formation
Geologic formation in the United States
thin-bedded calcisiltite with shale partings and interbeds. Overlying 5 m are light-yellowish-gray to olive-gray mudstone and shale. Above this interval are
Tonoloway_Formation
Rock formation in the United States
operating near the James River Face Wilderness. Those quarries produced roofing shale, light weight aggregate, and various materials for brick making. The Antietam
Chilhowee_Group
Geologic Formation in New York
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Oswayo_Formation
Geologic formation in Michigan
Rhinestreet Shale Sonyea Group Cashaqua Shale Middlesex Shale Genesee Group / Harrell Shale West River Shale Penn Yan Formation Burket Shale / Geneseo Shale Knapp
Bass_Islands_Formation
Geologic formation in West Virginia, United States
Bedford Shale Ohio Shale Brallier Formation Frasnian Brallier Formation Java Formation West Falls Formation Rhinestreet Sonyea Formation Harrell Shale Genesee
Rose_Hill_Formation
youngest surface rock in the state of Ohio. It consists of red and green shale, siltstone, and sandstone, with thin lenticular beds of argillaceous limestone
Dunkard_Group
Geologic formation in West Virginia
Bedford Shale Ohio Shale Brallier Formation Frasnian Brallier Formation Java Formation West Falls Formation Rhinestreet Sonyea Formation Harrell Shale Genesee
Elbrook_Formation
defined as a grayish-red and greenish-gray claystone, argillaceous siltstone, shale, and very fine to fine-grained sandstone, arranged in fining-upward cycles
Bloomsburg_Formation
Geological formation in the United States
Monongahela Group. The Conemaugh Group consists of cyclic sequences of shale, siltstone, sandstone, red beds, thin impure limestone, and thin nonpersistent
Casselman_Formation
Fossiliferous statigraphic unit
gray to yellowish-gray, thin- to thick-bedded dolomite and limestone; some shale layers; gradational contact with Antietam; thickness 200 to 1,000 feet."
Tomstown_Dolomite
Marylander mapped bedrock unit
McKenzie Formation is a gray, thin-bedded shale and argillaceous limestone, with interbedded red sandstone and shale in its eastern extents in Maryland. The
McKenzie_Formation
Geologic formation in West Virginia, United States
portal Paleontology portal The Pocahontas Formation contains sandstone, shale, and some coal. It is overlain by the New River Formation, and is exposed
Pocahontas_Formation
Geologic formation in the United States
Bedford Shale Ohio Shale Brallier Formation Frasnian Brallier Formation Java Formation West Falls Formation Rhinestreet Sonyea Formation Harrell Shale Genesee
Ridgeley_Sandstone
Geologic formation in the United States
Bedford Shale Ohio Shale Brallier Formation Frasnian Brallier Formation Java Formation West Falls Formation Rhinestreet Sonyea Formation Harrell Shale Genesee
Weverton_Formation
Geologic formation in West Virginia, United States
Carboniferous period. It is mainly made up of limestone, sandstone, and shale. Earth sciences portal Paleontology portal List of fossiliferous stratigraphic
Hinton_Formation
Geologic formation in the United States
Shenandoah Valley. It can also contain sometimes large beds of siltstone and shale. The Waynesboro is often covered by gravel washes from surrounding mountains
Waynesboro_Formation
Geological formation in the United States
sandstones; siltstone; "redbeds" of brownish-gray sandstone, siltstone, and shale containing scattered marine fossils; and occasional quartz-pebble conglomerate
Foreknobs_Formation
Bedrock unit in Pennsylvania, United States
United States. The formation is composed of relatively soft grayish-red shale and olive-gray sandstone. It is located in north central Pennsylvania. The
Huntley_Mountain_Formation
Bedrock formation in the United States
Virginia. The Scherr Formation consists predominantly of siltstone and shale. Lower part of unit includes considerable fine-grained sandstone, while
Scherr_Formation
Geologic formation in Arkansas, United States
The Bloyd Formation, or Bloyd Shale, is a geologic formation in Arkansas. It preserves fossils dating back to the Carboniferous period. The Bloyd Formation
Bloyd_Formation
River
and shale. The Trimmers Rock Formation contains sandstone, siltstone, silt shale, and silty clay shale. The Harrell Formation contains clay shale and
Walker_Run
Extinct marine lizards of the Late Cretaceous
also had a sensitive forked tongue. A study published in 2016 by T. Lyn Harrell, Alberto Pérez-Huerta and Celina Suarez showed that mosasaurs were endothermic
Mosasaur
Geologic unit in northern Arkansas and eastern Oklahoma
Formations overlie the Moorefield Formation and underlie the Fayetteville Shale. Pentremites P. elongatus P. godoni P. patei Earth sciences portal United
Hindsville_Formation
American television drama series (1984)
Millie Stephen Pearlman as Arnold Beckman Kelli Maroney as Joanne James N. Harrell as Dr. Taler Sherman Howard as Director John M. Jackson as Detective Primetime
Celebrity (American TV series)
Celebrity_(American_TV_series)
Genus of lizards
mosasaurs were fairly widespread). Plioplatecarpus has been found in the Pierre Shale of Kansas, Demopolis Chalk of Alabama, and also in Mississippi, Tennessee
Plioplatecarpus
Genus of pterosaur of the Late Cretaceous
Archived from the original on 2007-11-09. Retrieved 2026-03-08. Ehret, D.J.; Harrell, T.L. Jr. (2018). "Feeding traces on a Pteranodon (Reptilia: Pterosauria)
Pteranodon
Extinct genus of marine lizard from the Late Cretaceous
diet and diving behavior. To account for this, a 2014 study by T. Lynn Harrell Jr. and Alberto Perez-Huerta examined the concentration ratios of neodymium
Mosasaurus
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