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This is a general type for all kinds of geological formations. Its properties indicate the geological period during which a formation formed, and the types of rocks of which it is formed. This type includes Location, so you can specify the geocoordinates of the formation and pinpoint it...
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62 Geological formation topics matching:
Filter this Collection| x name | x image | x Formed during period | x Type of rock | x article |
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| x Baigong Pipes |
The Baigong Pipes are a series of pipe-like features found on and near Mount Baigong (白公山) about 40 km southwest of the city of Delingha, in the Haixi Mongol and Tibetan Autonomous Prefecture, Qinghai Province, China.
These pipe-like features are...
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| x The Twelve Apostles, Victoria |
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The Twelve Apostles is a collection of limestone stacks off the shore of the Port Campbell National Park, by the Great Ocean Road in Victoria, Australia. Their proximity to one another has made the site a popular tourist attraction. Originally the...
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| x Uluru |
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Paleozoic |
Uluru, also referred to as Ayers Rock, is a large sandstone rock formation in the southern part of the Northern Territory, central Australia. It lies 335 km (208 mi) south west of the nearest large town, Alice Springs; 450 km (280 mi) by road. Kata...
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| x La Amarga Formation |
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The La Amarga Formation is a geologic formation with outcrops in the Argentine provinces of Río Negro, Neuquén, and Mendoza. It is the oldest Cretaceous terrestrial formation in the Neuquén Basin.
The type locality is La Amarga Arroyo and China...
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| x Appekunny Formation |
Appekunny Formation is a thick series of rock strata located in the Lewis Range within Glacier National Park, Montana, USA. The formation is primarily mudstone and siltstone deposited in a shallow sea during the Proterozoic. The Appekunny Formation...
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| x Bakken Formation |
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The Bakken Formation, initially described by geologist J.W. Nordquist in 1953, is a rock unit from the Late Devonian to Early Mississippian age occupying about 200,000 square miles (520,000 km) of the subsurface of the Williston Basin, covering...
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| x Bald Eagle Formation |
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The Ordovician Bald Eagle Formation (Obe) is a mapped bedrock unit in central Pennsylvania, USA. It is a ridge-forming unit in the Appalachian Mountains.
The Bald Eagle is defined as a gray to olive-gray and grayish-red, fine to coarse-grained...
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| x Bayan Shireh Formation |
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The Bayan Shireh Formation (also known as Bayanshiree Svita or the Baynshirenskaya Formation) is a geological formation in Burkhant, Mongolia, that dates to the late Cretaceous period. The exact age is uncertain, with two competing hypotheses; based...
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| x Bellefonte Formation |
The Ordovician Bellefonte Formation (Obf) is a mapped bedrock unit in central Pennsylvania.
The Bellefonte is defined as a medium-gray, brownish-weathering, medium-bedded dolomite and minor sandstone. The very fine grained Tea Creek Member lies...
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| x Bloomsburg Formation |
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The Silurian Bloomsburg Formation (Sb) is a mapped bedrock unit in Pennsylvania, New Jersey, New York and Maryland. It is named for the Town of Bloomsburg, Pennsylvania for which it was first described. The Bloomsburg marked the first occurrence of...
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| x Carmel Formation |
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Middle Jurassic |
The Carmel Formation is a geologic formation in the San Rafael Group that is spread across the U.S. states of Wyoming, Utah, Colorado, north east Arizona and New Mexico. Part of the Colorado Plateau, this formation was laid down in the Middle...
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| x Central Lapland Greenstone Belt |
The Central Lapland Greenstone Belt (CLGB) is a greenstone belt located in the northern part of the Fennoscandian Shield. The region belongs to Lapland, northern Finland. The CLGB is part of a much larger belt of Paleoproterozoic greenstones, a...
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| x Chickies Formation |
The Cambrian Chickies Formation (Cch) is a mapped bedrock unit in Pennsylvania and Maryland. It is named for Chickies Rock, north of Columbia, Pennsylvania along the Susquehanna River.
The Chickies is described as a light-gray to white, hard,...
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| x Chitarwata Formation |
The Chitarwata Formation is a geological formation in western Pakistan, made up of Oligocene and early Miocene terrestrial facies. It is dominated by coastal paleoenvironments (estuarine, strandplain and tidal flat).
Paleomagnetic data indicates an...
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| x Chuckanut Formation |
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The Chuckanut Formation is a geological sequence of marine rock found in northwestern Washington, USA, composing part of the Chuckanut Mountains. It is the southern continuation of the British Columbian Huntingdon Formation. The Chuckanut formation...
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| x Coon Creek Formation |
The Coon Creek Formation is a geologic formation located in western Tennessee and extreme northeast Mississippi. It is a sedimentary sandy marl deposit, Late Cretaceous (Maastrichtian) in age, about 73 million years old. The formation is known for...
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| x Corton Formations |
The Corton Formation is a series of deposits of Middle Pleistocene age found primarily along the coasts of Suffolk and Norfolk in eastern England.
The formation comprises two stratigraphic facies, an upper thicker fine to medium sand which becomes a...
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| x Cutler Formation |
The Cutler is a rock unit that is spread across the U.S. states of Arizona, northwest New Mexico, southeast Utah and southwest Colorado. It was laid down in the Early Permian during the Wolfcampian stage. In Arizona and Utah it is often called the...
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| x El Tranquilo Formation |
The El Tranquilo Formation is a geologic formation dating to roughly between 228 to 200 million years ago and covering part of the Late Triassic. The El Tranquilo Formation is found in the Santa Cruz province of Argentina. Purported fossils of the...
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| x Fort Payne Formation |
The Fort Payne Formation, or Fort Payne Chert, is a geologic formation located in the southeastern region of the United States. It is a Mississippian cherty limestone that overlies the Chattanooga Shale (or locally the Maury Formation) and underlies...
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| x Franciscan Assemblage |
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The Franciscan Assemblage is a geological term for an accreted terrane of heterogeneous rocks found on and near the San Francisco Peninsula. It was named by geologist Andrew Lawson who also named the San Andreas Fault which bounds the Franciscan...
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| x Galena Group |
The Galena Group or Galena Limestone refers to a sedimentary sequence of Ordovician limestone that was deposited atop the Decorah Shale. It is part of the Ordovician stratigraphy of the Upper Midwestern United States. It was deposited in a calm...
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| x Girkin Formation |
The Girkin Formation is a geologic formation located in the Chester Escarpment of central Kentucky, USA. It comprises a level of Mammoth Cave and lies above the Ste. Genevieve Limestone and St. Louis Limestone and below the Big Clifty Sandstone in...
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| x Green River Formation |
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The Green River Formation is an Eocene geologic formation that records the sedimentation in a group of intermountain lakes. The sediments are deposited in very fine layers, a dark layer during the growing season and a light-hue inorganic layer in...
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| x Hamilton Group |
The Devonian Hamilton Group (Dh) is a mapped bedrock unit in New York, Pennsylvania, Maryland, and West Virginia. In Virginia, it is known as the laterally equivalent Millboro Shale. The group is named for the village of Hamilton, New York. These...
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| x Hell Creek Formation |
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The Hell Creek Formation is an intensely-studied division of Upper Cretaceous to lower Paleocene rocks in North America, named for exposures studied along Hell Creek, near Jordan, Montana.
The Hell Creek Formation occurs in Montana and portions of...
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| x Holston Formation |
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The Holston Formation, alternately known as the Holston Limestone, is a stratigraphic unit of Ordovician age within the Chickamauga Group in the Ridge-and-Valley physiographic province of the southeastern United States. A 120-mile (190 km) long...
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| x Huntley Mountain Formation |
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The Huntley Mountain Formation (abbreviated MDhm) is a late Devonian and early Mississippian mapped bedrock unit in Pennsylvania, in the United States. The formation is composed of relatively soft grayish-red shale and olive-gray sandstone. It is...
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| x Jiufotang Formation |
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The Jiufotang Formation is an Early Cretaceous geological formation in Chaoyang, Liaoning which has yielded fossils of feathered dinosaurs, primitive birds, pterosaurs, and other organisms. (see Jehol Biota). It is a member of the Jehol group. The...
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| x Judith River Formation |
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Late Cretaceous |
The Judith River Formation is a fossil-bearing geologic formation in Montana, and is part of the Judith River Group. It dates to the upper Cretaceous. It is an historically important formation, explored by early American paleontologists such as...
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| x Juniata Formation |
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The Ordovician Juniata Formation (Oj) is a mapped bedrock unit in Pennsylvania and Maryland. It is a relative slope-former occurring between the two prominent ridge-forming sandstone units: the Tuscarora Formation and the Bald Eagle Formation in the...
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| x Khatyspyt Formation |
The Khatyspyt Formation is a Neoproterozic formation exposed in the Olenëk Uplift, northeast Siberia, which contains the only known instance of the Ediacara biota preserved in a limestone bed.
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| x Lakota Formation | Barremian |
The Lakota Formation is a sequence of rocks from the Barremian (early Cretaceous) epoch from Western North America. Located in South Dakota, the name is derived from the Lakota Native American tribe.
Life forms recovered include the ornithopod...
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| x Llano Uplift |
The Llano Uplift is a roughly circular geologic dome of Precambrian rock, primarily granite, in Central Texas in the United States. It is located in the eastern region of the Edwards Plateau, west of the Texas Hill Country. The region is...
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| x Llewellyn Formation |
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The Llewellyn Formation is a mapped bedrock unit in eastern Pennsylvania. It was previously known as the "coal measures" and the post-Pottsville rocks. The formation is named for the community of Llewellyn in Schuylkill County.
The Llewellyn is...
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| x Lock Haven Formation |
The Lock Haven Formation (abbreviated Dlh) is a Devonian mapped bedrock unit in Pennsylvania, in the United States. It is gray to green-brown siltstone and shale and is over 400 million years old. It is located in northcentral Pennsylvania and can...
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| x Maevarano Formation |
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The Maevarano Formation is an Upper Cretaceous sedimentary rock formation found in the Mahajanga Province of northwestern Madagascar. It is most likely Maastrichtian in age, and records a seasonal, semiarid environment with rivers that had greatly...
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| x Mahantango Formation |
The Devonian Mahantango Formation (Dmh) is a mapped bedrock "unit" in Pennsylvania, New Jersey, New York and Maryland. It is named for the North branch of the Mahantango Creek in Perry and Juniata counties in Pennsylvania. It is a member of the...
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| x Maquoketa Group |
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The Maquoketa Group is an assemblage of several geologic formations. It is Upper Ordovician in age and named for the Maquoketa River in Iowa. It exists in Missouri, Wisconsin, Iowa, Illinois, and Indiana. It is equivalent to the all but the basal...
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| x Marcellus Formation |
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Shale |
The Marcellus Formation, also classified as the Marcellus Subgroup of the Hamilton Group, Marcellus Member of the Romney Formation, or simply the Marcellus Shale, is a unit of marine sedimentary rock found in eastern North America. Named for a...
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| x Martinsburg Formation |
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The Ordovician Martinsburg Formation (Om) is a mapped bedrock unit in Pennsylvania, New Jersey, Maryland, Virginia, and West Virginia. It is named for the town of Martinsburg, West Virginia for which it was first described. It is the dominant rock...
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| x Mauch Chunk Formation |
The Mississippian Mauch Chunk Formation (Mmc) is a mapped bedrock unit in Pennsylvania, Maryland, and West Virginia. It is named for the borough of Mauch Chunk, now known as Jim Thorpe, Pennsylvania.
The Mauch Chunk is defined as a grayish-red shale...
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| x McKenzie Formation |
The Silurian McKenzie Formation (Sm) is a mapped bedrock unit in Maryland.
The McKenzie Formation is a Gray, thin-bedded shale and argillaceous limestone, with interbedded red sandstone and shale in its eastern extents in Maryland. The thickness...
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| x Monterey Formation |
The Monterey Formation is an extensive Miocene oil-rich geological sedimentary formation in California, with massive outcroppings of the formation in areas of the California Coast Ranges, Peninsular Ranges, and on some of California's off-shore...
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| x Mount Kirkpatrick Formation |
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The Mount Kirkpatrick Formation is one of only two major dinosaur-bearing rock formations yet found on the continent of Antarctica; the other is the Santa Marta Formation from the Late Cretaceous. However, only a handful of prehistoric specimens...
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| x Mporokoso Group |
The Mporokoso Group is the name given to a sedimentary succession of fluvial, lacustrine and aeolian sandstones and minor siltstones occurring on the Bangweulu Block of northern Zambia.
The succession is likely to be largely over 1.8 billion years...
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| x Naturita Formation |
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The Naturita Formation was named by Robert G. Young (1960, 1965) for Cretaceous sedimentary rocks exposed near Naturita, Colorado.
The formation lies between the Cedar Mountain Formation (sometimes called the Burro Canyon Formation in Colorado) and...
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| x Passaic Formation |
The Passaic Formation is a mapped bedrock unit in Pennsylvania, New Jersey, and New York. It was previously known as the Brunswick Formation since it was first described in the vicinity of New Brunswick, New Jersey. It is now named for the Passaic...
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| x Pocono Formation |
The Mississippian Pocono Formation (Mp) is a mapped bedrock unit in Pennsylvania, Maryland, and West Virginia It is also known as the Pocono Group in Maryland and West Virginia), and the upper part of the Pocono Formation is sometimes called the...
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| x Potomac Formation |
The Potomac Formation consists of Lower Cretaceous to Upper Cretaceous strata located in Delaware, Maryland, and New Jersey, in the eastern United States.
Flora found include large cycads.
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| x Pottsville Formation |
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The Pennsylvanian Pottsville Formation (φp) is a mapped bedrock unit in eastern Pennsylvania, western Maryland and West Virginia. It is a major ridge-former In the Ridge-and-Valley Appalachians of the eastern United States
The carboniferous...
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| x Reedsville Formation |
The Ordovician Reedsville Formation (Or) is a mapped bedrock unit in central Pennsylvania that extends into the subsurface of Ohio. This rock is a slope-former adjacent (and stratigraphically below) to the prominent ridge-forming Bald Eagle...
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| x Santana Formation |
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Cretaceous |
The Santana Formation is a geologic Lagerstätte (undisturbed fossil accumulation) in northeastern Brazil's Araripe Basin where the states of Pernambuco, Piauí and Ceará come together. The geological formation, named after the village of Santana do...
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| x Shawangunk Formation |
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The Silurian Shawangunk Formation (Ss) is a mapped bedrock unit in eastern Pennsylvania, New Jersey, and New York. It is named for the Shawangunk Ridge for which it is the dominant rock type. The division of the Shawangunk between the Tuscarora...
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| x Tuscarora Formation |
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Quartzite |
The Silurian Tuscarora Formation (St) — also known as Tuscarora Sandstone or Tuscarora Quartzite — is a mapped bedrock unit in Pennsylvania, Maryland, Virginia and West Virginia.
The Tuscarora is a thin- to thick-bedded fine-grained to coarse...
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| x Upper Elliot Formation |
The Upper Elliot Formation is a geological formation dating to roughly between 200 to 190 million years ago and covering the Hettangian to Sinemurian stages. The Upper Elliot Formation is found in South Africa and Lesotho and is a member of the...
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| x Wenlock Group |
Wenlock Group (Wenlockian), in geology, is the middle series of strata in the Silurian (Upper Silurian) of Great Britain. This group in the typical area in the Welsh border counties contains the following formations: Much Wenlock Limestone Formation...
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| x Wills Creek Formation |
The Silurian Wills Creek Formation (Swc) is a mapped bedrock unit in Pennsylvania, Maryland and West Virginia. It forms the bedrock of the valley around and to the east of Lewistown, Pennsylvania.
The Wills Creek is defined as a moderately well...
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| x Winton Formation |
The Winton Formation is a Cretaceous formation in central-western Queensland, Australia. The sauropod dinosaur Austrosaurus is found in the early Cretaceous Winton formation.
This formation is a rock unit that blankets large areas of central-western...
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| x Wissahickon Formation |
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The Wissahickon Formation is a mapped bedrock unit in Pennsylvania, New Jersey, and Delaware. In Maryland, the term "Wissahickon" is no longer used and has since been divided into several units. It is named for the Wissahickon gorge in Fairmount...
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