 | This article relies largely or entirely on a single source .(May 2021) |
| Aral Formation Stratigraphic range: Oligocene – Miocene | |
|---|---|
| Type | Formation |
| Location | |
| Coordinates | 50.3° N, 57.2° E W [1] |
| Region | Aktyubinsk |
| Country | Kazakhstan |
The Aral Formation is a geologic formation in Kazakhstan. It preserves fossils dating back to the Neogene period. [1] Much of its fossils consist of Glires and fish, though cetaceans and cryptobranchid salamanders are also known.
The Aral Formation has yielded a rich variety of extinct mammals. Many of its mammal fauna consists of the clade Glires with rodents being particularly numerous. [1]
| Genus | Species | Notes | Images |
|---|---|---|---|
| Corbula [1] | C. helmerseni | A bivalve |  |
| Genus | Species | Notes | Images |
|---|---|---|---|
| Odontaspis [1] | Species indeterminate | A sand tiger shark. | |
| Genus | Species | Notes | Images |
|---|---|---|---|
| Acipenser [1] | Species indeterminate | A sturgeon. | |
| Cyprinidae indet. [1] | Genus and species indeterminate | A carp. | |
| Esox [1] | E. aralensis | A pike. | |
| Percidae indet. [1] | Gensu and species indeterminate | A perch. | |
| Genus | Species | Notes | Images |
|---|---|---|---|
| Cryptobranchidae indet. [1] | Genus and species indeterminate. | A giant salamander. | |
| Genus | Species | Notes | Images |
|---|---|---|---|
| Aralocricetodon [1] | A. schokensis | A cricetid. | |
| Asianeomys [1] | A. bolligeri. | An eomyid. | |
| Eumyarion [1] [2] | E. tremulus | A mouse. | |
| Eucricetodon [1] [2] | E. occasionalis | A mouse. | |
| Plesiosminthus [1] | P. tereskentensis | A jumping mouse. | |
| Propalaeocastor [1] | P. kumbulakensis | A castorid. | |
| Genus | Species | Notes | Images |
|---|---|---|---|
| Desmatolagus | D. gobiensis, D. simplex, D. periaralicus. | A rabbit. | |
| Genus | Species | Notes | Images |
|---|---|---|---|
| Amphechinus | A. minimus | A hedgehog. | |
| Desmaninae indet. | Indeterminate genus and species. | A desman. | |
| Gobisorex | G. kingae. | A shrew. | |
| Talpidae indet. | Indeterminate genus and species. | A mole. | |
| Genus | Species | Notes | Images |
|---|---|---|---|
| Delphinidae indet. | Indeterminate genus and species. | A dolphin. | |
The Kaibab Limestone is a resistant cliff-forming, Permian geologic formation that crops out across the U.S. states of northern Arizona, southern Utah, east central Nevada and southeast California. It is also known as the Kaibab Formation in Arizona, Nevada, and Utah. The Kaibab Limestone forms the rim of the Grand Canyon. In the Big Maria Mountains, California, the Kaibab Limestone is highly metamorphosed and known as the Kaibab Marble.
The Ieper Group is a group of rock strata in the subsurface of northwest Belgium. The group is subdivided into three marine formations, all formed during the Ypresian, a single age of the geologic timescale. Both age and group are named after the West Flemish town of Ypres, for which the Dutch name is "Ieper".
The Santa Lucía Formation is a Maastrichtian to Paleocene (Danian) geologic formation in Bolivia. Fossil ornithopod tracks have been reported from the Cretaceous lower part of the formation. It is the type formation of the Tiupampan South American land mammal age.
The Hannold Hill Formation is an Early Eocene (Wasatchian) geologic unit in the western United States. It preserves the fossilized remains of the ray Myliobatis and gar.
The Bone Valley Formation is a geologic formation in Florida. It is sometimes classified as the upper member of the Peace River Formation of the Hawthorn Group. It contains economically important phosphorite deposits that are mined in west-central Florida, as well as rich assemblages of vertebrate fossils.
The Washakie Formation is a geologic formation in northern Colorado and southern Wyoming. It preserves many mammal, bird, reptile and other fossils dating back to the Lutetian stage of the Eocene within the Paleogene period. The sediments fall in the Bridgerian and Uintan stages of the NALMA classification.
The Hoback Formation is a geologic formation in west-central Wyoming, located within the Hoback Basin. It formed as a result of increased sedimentation rates from the Laramide Orogeny and preserves fossils dating back to the late Paleogene period, through the early Eocene.
The Indian Meadows Formation is a Wasatchian geologic formation in Wyoming. It preserves fossils dating back to the Ypresian stage of the Eocene period.
The Pass Peak Formation is a Wasatchian geologic formation in Wyoming. It preserves fossils dating back to the Ypresian stage of the Eocene period.
The Galisteo Formation is a geologic formation in New Mexico. It contains fossils characteristic of the Bartonian stage of the Eocene epoch, Duchesnean in the NALMA classification.
The San Jose Formation is an Early Eocene geologic formation in the San Juan Basin of New Mexico and Colorado.
The Crowder Formation is a geologic formation in the Central and Western Mojave Desert, in northern Los Angeles County and eastern San Bernardino County, in Southern California.
The Mint Canyon Formation (Tm) is a Miocene geologic formation in the Sierra Pelona Mountains of Los Angeles County, southern California. The formation preserves fossils dating back to the Middle to Late Miocene.
The Diligencia Formation (Td) is a geologic formation cropping out in the Orocopia Mountains in southern California. It preserves mammal fossils dating to the Late Oligocene to Early Miocene.
The Coalspur Formation is an Upper Cretaceous to lower Palaeocene stratigraphic unit of the Western Canada Sedimentary Basin in the foothills of southwestern Alberta. Its deposition spanned the time interval from latest Cretaceous (Maastrichtian) to early Palaeocene, and it includes sediments that were deposited before, during, and after the Cretaceous-Paleogene (K-Pg) extinction event. It includes the economically important coal deposits of the Coalspur Coal Zone, as well as nonmarine plant and animal fossils.
The Mount Whyte Formation is a stratigraphic unit that is present on the western edge of the Western Canada Sedimentary Basin in the southern Canadian Rockies and the adjacent southwestern Alberta plains. It was deposited during Middle Cambrian time and consists of shale interbedded with other siliciclastic rock types and limestones. It was named for Mount Whyte in Banff National Park by Charles Doolittle Walcott, the discoverer of the Burgess shale fossils, and it includes several genera of fossil trilobites.
The Las Tetas de Cabra Formation is a geologic formation in Mexico. It preserves fossils dating back to the Wasatchian of the Early Eocene period.
Cura-Mallín Group is a heterogeneous group of volcano-sedimentary formations of Oligocene-Miocene age, Colhuehuapian to Laventan in the SALMA classification, in south-central Chile and nearby parts of Argentina. The sediments belonging to the group were deposited in a lacustrine environment and alongside rivers in an intra-arc basin. Southeast of Laguna del Laja Cura-Mallín Group has a thickness of more than 1,800 metres (5,900 ft). The sediments making up the group deposited in an interval between 22 and 8 million years ago.
Río Frías Formation is a Middle Miocene geologic formation made up sedimentary rock located in Aysén Region, western Patagonia. The formation crops out along the upper couse of Cisnes River. Marsupial fossils have been found in the formation. The Friasian period in the South American Land Mammal Ages is named after the formation.