| Jackson Bluff Formation Stratigraphic range: Neogene | |
|---|---|
| Type | Formation |
| Location | |
| Region |  Florida |
| Country |  United States |
The Jackson Bluff Formation is a geologic formation in Florida. It preserves fossils dating back to the Neogene period. [1]
| Jackson Bluff Formation Stratigraphic range: Neogene | |
|---|---|
| Type | Formation |
| Location | |
| Region | Florida |
| Country | United States |
The Jackson Bluff Formation is a geologic formation in Florida. It preserves fossils dating back to the Neogene period. [1]
Megalonychidae is a group of sloths including the extinct Megalonyx. Megalonychids first appeared in the early Oligocene, about 35 million years (Ma) ago, in southern Argentina (Patagonia). There is actually one possible find dating to the Eocene, about 40 Ma ago, on Seymour Island in Antarctica. They first reached North America by island-hopping across the Central American Seaway, about 9 million years ago, prior to formation of the Isthmus of Panama about 2.7 million years ago. Some megalonychid lineages increased in size as time passed. The first species of these were small and may have been partly tree-dwelling, whereas the Pliocene species were already approximately half the size of the huge Late Pleistocene Megalonyx jeffersonii from the last ice age.
Nalacetus is an extinct pakicetid early whale, fossils of which have been found in Lutetian red beds in Punjab, Pakistan. Nalacetus lived in a fresh water environment, was amphibious, and carnivorous. It was considered monophyletic by Cooper, Thewissen & Hussain 2009. It was said to be wolf-sized and one of the earliest forms of the order Cetacea.
Albertogaudrya is an extinct genus of astrapotherian mammal that lived in present-day Salta, Argentina during the Eocene 48.6 to 37.2 million years ago. Fossils of Albertogaudrya have been found in the Lumbrera and Sarmiento Formations. It is named after French palaeontologist Albert Gaudry.
The Fort Thompson Formation is a geologic formation in Florida. It preserves fossils dating back to the late Pleistocene. It was influenced by sea level changes.
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.
![Caloosahatchee Formation Geologic formation in Florida. It preserves fossils dating back to the [[Pleistocene]].](https://upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Hystrivasum_horridum_01.JPG/320px-Hystrivasum_horridum_01.JPG)
The Caloosahatchee Formation is a geologic formation in Florida. It preserves fossils dating back to the Pleistocene.
The Coffee Mill Hammock Formation is a geologic formation in Florida. The formation is about two-feet thick and is composed of shell marl. It sits on top of the Fort Thompson Formation and preserves fossils from the Late Pleistocene, predominantly Chione cancellata. It can be seen at Goodno's Landing, Fort Thompson, and at Coffee Mill Hammock, 12 north of LaBelle, Florida, in Glades County.
The Key Largo Limestone is a geologic formation in Florida. It is a fossilized coral reef. The formation is exposed along the upper and middle Florida Keys from Soldier Key to the Bahia Honda Channel. The islands form a long narrow arc concentric with the inner edge of the Florida Straits and with the Florida Reef. The limestone includes fossils of corals, mollusks and bryozoans. Fossilized coral head formations are visible in some exposures. The Key Largo Limestone continues in a narrow band underwater just offshore of the coast of Florida north of Soldier Key to the middle of the Palm Beach County coast, and southward just offshore of the lower Florida Keys to the Dry Tortugas.
The Goodland Limestone or Goodland Formation is a geologic formation in Arkansas and Texas. It preserves fossils dating back to the Cretaceous period.
The Polecat Bench Formation is a geologic formation in Montana. It preserves fossils dating back to the Paleogene period. The polyglyphanodontian lizard Chamops is known from this formation.
The Ixtaltepec Formation is a geologic formation in Oaxaca state, southwestern Mexico.
The Taraises Formation is a geologic formation in northern Mexico. It preserves fossils dating back to the Early Cretaceous, including ammonites.
The Agua Nueva Formation is a geologic formation in Mexico. It preserves fossils dating back to the upper part of the Cenomanian stage of the Cretaceous period. It consists "predominantly of alternating fossiliferous, organic matter-rich, laminated, dark gray limestone and non-laminated, organic matter-poor limestone in decimeter-thick beds with occasional centimetric beds of brown shale that show no apparent internal structures." The formation is noted for its qualities as a Konservat-Lagerstätte, with notable finds including the plesiosaur Mauriciosaurus and shark Aquilolamna.
The El Abra Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cretaceous period.
The Mal Paso Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cretaceous period, Late Albian.
The La Caja Formation is a geologic formation in Mexico. It preserves fossils datiting from the Kimmeridgian to the lower Berriasian. La Caja Formation is widespread in northeastern and central Mexico and known for their abundant and diverse well-preserved ammonites. It was deposited in hemipelagic conditions, and predominantly consists of siliclastic sediments, including marl, with limestone. It is laterally equivalent to the La Casita Formation, which represent more proximal facies. The ichthyosaurs Ophthalmosaurus icenicus and Parrassaurus yacahuitztli, metriorhynchid Cricosaurus saltillensis and the giant pliosaur "Monster of Aramberri" are known from the formation.
The La Casita Formation is a geologic formation in Mexico. It preserves fossils dating back to the Kimmeridgian to lowermost Berriasian. It is laterally equivalent to the La Caja Formation and the Pimienta Formation. The ichthyosaurs Jabalisaurus and Acuetzpalin are known from the formation, as well as the metriorhynchid Dakosaurus and indeterminate pliosaurs.
The Pimienta Formation is a geologic formation in Mexico. It preserves fossils dating back to the Tithonian-Berriasian. The formation is considered laterally equivalent to the La Casita Formation. The Metriorhynchid Cricosaurus vignaudi is known from the formation.
The Zorrillo Formation is a geologic formation in Mexico, near Tezoatlán de Segura y Luna, Oaxaca. It preserves fossils dating back to the Jurassic period.
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