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Fuchsite

Fuchsite, also known as chrome mica, is a chromium rich variety of the mineral muscovite, belonging to the mica group of phyllosilicate minerals, with the following formula: K 2 2. Trivalent chromium replaces one of the aluminium Al atoms in the ...

                                               

Organoclay

Organoclay is an organically modified phyllosilicate, derived from a naturally occurring clay mineral. By exchanging the original interlayer cations for organocations an organophilic surface is generated, consisting of covalently linked organic m ...

                                               

Krutaite

Krutaite is a rare mineral with the formula CuSe 2. It crystallises in the cubic crystal system. It is part of the pyrite group, being composed of Cu 2+ ions and Se 2 2− ions. The mineral is most often found as a dark grey aggregate consisting of ...

                                               

Sulfosalt minerals

Sulfosalt minerals are those complex sulfide minerals with the general formula: A m B n S p ; where A represents a metal such as copper, lead, silver, iron, and rarely mercury, zinc, vanadium; B usually represents semi-metal such as arsenic, anti ...

                                               

Bright Angel Shale

The Cambrian Bright Angel Shale is the middle layer of the three member Tonto Group geologic feature. It is about 500 feet thick at its maximum. It is a nonresistant slope-forming unit. The Bright Angel Shale consists of green and purple-red, sil ...

                                               

Kittatinny Formation

The Ordovician Kittatinny Formation or Kittatinny Limestone is a dolomitic limestone formation in New Jersey. The Kittatinny Limestones are located primarily in the Kittatinny Valley where it lies above the Ordovician Martinsburg Formation within ...

                                               

Muav Limestone

The Cambrian Muav Limestone is the upper geologic unit of the 3-member Tonto Group. It is about 650 feet thick at its maximum. It is a resistant cliff-forming unit. The Muav consists of dark to light-gray, brown, and orange red limestone with dol ...

                                               

Stephen Formation

The Stephen Formation is a geologic formation exposed in the Canadian Rockies of British Columbia and Alberta, on the western edge of the Western Canada Sedimentary Basin. It consists of shale, thin-bedded limestone, and siltstone that was deposi ...

                                               

Tapeats Sandstone

The Cambrian Tapeats Sandstone is the lower geologic unit, about 230 feet thick, at its maximum, of the 3-member Tonto Group. The Tapeats Sandstone is the highly erosion-resistant unit laid upon the Vishnu Basement Rocks in the central, parts of ...

                                               

Vampire Formation

A formation of delta-front siliciclastics deposited in the early Cambrian. The upper unit is trilobitic Cambrian. Some authors place the underlying Ingta formation at least partially in the Cambrian; in places it overlies the sub-Cambrian unconfo ...

                                               

Exmoor Group

The Exmoor Group is a late Devonian to early Carboniferous lithostratigraphic group in southwest England whose outcrop extends from Croyde in north Devon east across Exmoor to Minehead in west Somerset. The group comprises the following formation ...

                                               

Hunts Bay Oolite

Hunts Bay Oolite is an oolitic carboniferous limestone geological formation found in the south Wales region. It is named after Hunts Bay on the Gower peninsula, south-south west of Bishopston, where a significant amount of the limestone forms the ...

                                               

Huntley Mountain Formation

Haystacks beds, also in Loyalsock Creek The type section of the formation is at Huntley Mountain in Lycoming County, Pennsylvania, on the mountainside just north of the village of Waterville. Base of the Loyalsock Creek gorge in Worlds End State Park

                                               

Rockwell Formation

The Rockwell Formation is a late Devonian and early Mississippian mapped bedrock unit in West Virginia, Maryland, and Pennsylvania, in the United States.

                                               

Lower Cretaceous Series of Europe

                                               

Adel Mountains Volcanic Field

The Adel Mountains Volcanic Field is an ancient volcanic field of heavily eroded 75-million-year-old igneous rocks about 40 miles long and 20 miles wide in west-central Montana about 30 miles southwest of the city of Great Falls. The area was nam ...

                                               

Alberta Group

The Alberta Group is a stratigraphical unit of Cenomanian to early Campanian age in the Lewis overthrust in the Western Canadian Sedimentary Basin. It takes the name from the province of Alberta, and was first described in outcrops along the High ...

                                               

Cretaceous System of Australia

                                               

Bedford Shale

The Bedford Shale is a shale geologic formation in the states of Ohio, Michigan, Pennsylvania, Kentucky, West Virginia, and Virginia in the United States.

                                               

Harrell Shale

Type locality is at Horrell Station, Blair County, Pennsylvania 40°27′N 78°17′W.

                                               

Jeffersonville Limestone

Type locality is at Falls of the Ohio State Park near Louisville, Kentucky.

                                               

Old Port Formation

The Devonian Old Port Formation is a mapped bedrock unit in Pennsylvania, USA. Details of the type section and of stratigraphic nomenclature for this unit as used by the U.S. Geological Survey are available on-line at the National Geologic Map Da ...

                                               

Ridgeley Sandstone

The Ridgeley sandstone is a sandstone or quartzite of Devonian age found in the Appalachian Mountains of Pennsylvania, Maryland, West Virginia, and Virginia, United States. The Ridgeley is fine-grained, siliceous, calcareous in its lower strata, ...

                                               

Temple Butte Formation

The Devonian Temple Butte Formation, also called Temple Butte Limestone, outcrops through most of the Grand Canyon of Arizona, USA; it also occurs in southeast Nevada. Within the eastern Grand Canyon, it consists of thin, discontinuous and relati ...

                                               

Jeffersonville Limestone

                                               

Bayan Bologai Formation

The Bayan Bologai Formation is a Mesozoic geologic formation in Mongolia. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.

                                               

Chichali Formation

The Chichali Formation is a Mesozoic geologic formation in Pakistan. Plesiosaur remains are among the fossils that have been recovered from its strata.

                                               

Chilgog Formation

The Chilgog Formation is a Mesozoic geologic formation in South Korea. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.

                                               

Dohoin Usa Formation

The Dohoin Usu Formation is a Mesozoic geologic formation in Mongolia. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.

                                               

Iljig Formation

The Iljig Formation is a Mesozoic geologic formation in South Korea. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.

                                               

Kallanakurichi Formation

The Kallanakurichi Formation is a Mesozoic geologic formation in India. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.

                                               

Kankazgan Formation

Fossils that have been recovered from the formation include indeterminate dromaeosaurids, ornithomimids, ceratopsians, scapherpetonids, and tyrannosauroids, but also fossils of the azhdarchid pterosaur Azhdarcho.

                                               

Mishash Formation

                                               

Nagdong Formation

The Nagdong Formation is a Mesozoic geologic formation in South Korea. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.

                                               

Shemshak Formation

                                               

Sinuiju Formation

The Sinuiju Formation is a Mesozoic geologic formation in North Korea. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.

                                               

Upper Triassic Series

                                               

Silurian System of North America

                                               

Dapuka Group

                                               

Fengjiahe Formation

The Fengjiahe Formation is a geological formation in China. It dates back to the Early Jurassic. The formation is up to 1500 metres thick and consists of "purple-red mudstone and argillaceous siltstone interbedded with gray-green and yellow-green ...

                                               

Xintiangou Formation

The Xintiangou Formation is a geological formation in China. Part of the stratigraphy of the Sichuan Basin, it is of an uncertain Middle Jurassic age, with preliminary U-Pb estimates giving an age range of 180-170 ma. It predominantly consists of ...

                                               

Ziliujing Formation

The Ziliujing Formation is a geological formation in China, It is Early Jurassic in age. It is part of the stratigraphy of the Sichuan Basin. The dinosaur Gongxianosaurus and indeterminate theropod material are known from the Dongyuemiao Member o ...

                                               

Hasle Formation

                                               

Brown Dense

The Brown Dense limestone is an informal name used by petroleum geologists for a layer of rock that lies beneath large parts of southern Arkansas and northwest Louisiana. The Brown Dense is a 300- to 500-foot thick interval within organic-rich, f ...

                                               

Carmel Formation

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 Jur ...

                                               

Kayenta Formation

                                               

Jurassic System of Australia

                                               

Iron Canyon Site

The Iron Canyon Site is a Miocene assemblage of vertebrate fossils located in Kern County, California within the Dove Spring Formation dating from ~23.03 - 5.33 Ma.

                                               

Hagerman Horse Quarry

The Hagerman Horse Quarry is a paleontological site containing the largest concentration of Hagerman horse fossils yet found. The quarry is within Hagerman Fossil Beds National Monument, located west of Hagerman, Idaho, USA, at the geographic div ...

                                               

Clarno Formation

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