Potrerillos Formation, Mexico

Last updated
Potrerillos Formation
Stratigraphic range: Maastrichtian-Early Paleocene
~70–62  Ma
Type Formation
Unit of Difunta Group
Sub-unitsUpper Mudstone member
Lithology
Primary Mudstone
Other Grainstone
Location
Coordinates 26°00′N100°48′W / 26.0°N 100.8°W / 26.0; -100.8
Approximate paleocoordinates 31°42′N82°42′W / 31.7°N 82.7°W / 31.7; -82.7
Region Coahuila
CountryFlag of Mexico.svg  Mexico
Mexico relief location map.jpg
Green-orange pog.svg
Potrerillos Formation, Mexico (Mexico)

The Potrerillos Formation is a geologic formation in Mexico. It preserves fossils dating back to the Early Paleocene period. [1]

Contents

Description

The Potrerillos Formation was subdivided into five members by McBride (1974), with the second highest, the Upper Mudstone Member. Foraminifera in the lower members indicate a Maastrichtian age, while fossils in the upper members indicate a Paleocene age. Fossil remains are abundant and include transported remains of corals, gastropods, bivalves, shark teeth, and bone fragments. [1]

Fossil content

The following fossils have been reported from the formation: [1]

See also

Related Research Articles

<i>Cimexomys</i> Extinct genus of North American mammal

Cimexomys is an extinct North American mammal that lived from the Upper Cretaceous to the Paleocene. For a while, it shared the world with dinosaurs, but outlived them. It was a member of the extinct order Multituberculata and lies within the suborder Cimolodonta. It is perhaps a member of the Paracimexomys group, though it is not certain.

<i>Catopsalis</i> Extinct genus of mammals

Catopsalis is a genus of extinct mammal from the Paleocene of North America. This animal was a relatively large member of the extinct order of Multituberculata. Most multituberculates were much smaller.

Mimetodon is a small mammal from the Paleocene of North America and perhaps Europe. It was a member of the extinct order Multituberculata within the suborder Cimolodonta and family Neoplagiaulacidae.

Parectypodus is an extinct genus of mammals that lived from Late Cretaceous (Maastrichtian) to Eocene time in North America. It is a member of the extinct order of Multituberculata, suborder Cimolodonta, family Neoplagiaulacidae. It was named by G.L. Jepsen in 1930.

Anconodon is an extinct genus of mammal from the Paleocene of North America, and thus lived just after the "age of the dinosaurs". It was a member of the extinct order Multituberculata within the suborder Cimolodonta and possibly the family Cimolodontidae.

Eucosmodon is a genus of extinct mammal from the Paleocene of North America. It is a member of the extinct order of Multituberculata within the suborder of Cimolodonta, and the family Eucosmodontidae. This genus has partly also been known as Neoplagiaulax. All known fossils of this small mammal are restricted to teeth.

<i>Palinurus</i> (crustacean) Genus of crustaceans

Palinurus is a genus of spiny lobsters in the family Palinuridae, native to the eastern Atlantic Ocean, Mediterranean Sea and western Indian Ocean. A 110-million-year-old fossil, recognisable as a member of the genus Palinurus, was discovered in a quarry in El Espinal in Mexico's Chiapas state in 1995 and named P. palaciosi.

<span class="mw-page-title-main">Aquia Formation</span>

The Aquia Formation is a geologic sandstone formation that extends from the upper Chesapeake Bay to the James River near Hopewell, Virginia. It consists of clayey, silty, very shelly, glauconitic sand. Fossil records indicate that this stratigraphic unit was created during the Paleocene.

<span class="mw-page-title-main">Bisti/De-Na-Zin Wilderness</span> Wilderness in New Mexico, United States

The Bisti/De-Na-Zin Wilderness is a 45,000-acre (18,000 ha) wilderness area located in San Juan County in the U.S. state of New Mexico. Established in 1984, the Wilderness is a desolate area of steeply eroded badlands managed by the Bureau of Land Management, except three parcels of private Navajo land within its boundaries. The John D. Dingell, Jr. Conservation, Management, and Recreation Act, signed March 12, 2019, expanded the Bisti/De-Na-Zin Wilderness by approximately 2,250 acres.

<span class="mw-page-title-main">Raton Formation</span> A geologic formation in New Mexico and Colorado

The Raton Formation is a geological formation of Upper Cretaceous and Paleocene age which outcrops in the Raton Basin of northeast New Mexico and southeast Colorado.

<span class="mw-page-title-main">Nacimiento Formation</span> A geologic formation in New Mexico

The Nacimiento Formation is a sedimentary rock formation found in the San Juan Basin of western New Mexico. It has an age of 61 to 65.7 million years, corresponding to the early and middle Paleocene. The formation has yielded an abundance of fossils from shortly after the Cretaceous-Paleogene extinction event that provide clues to the recovery and diversification of mammals following the extinction event.

The Tahora Formation is a Late Cretaceous geologic formation that outcrops in northeastern New Zealand near Napier. It is Haumurian in age according to the New Zealand geologic time scale. It forms part of the Upper Cretaceous to Teurian (Danian) Tinui Group. It unconformably overlies the Jurassic to Lower Cretaceous Urewera Group or the Upper Cretaceous Matawai Group. It is conformably overlain by the Haumurian to Teurian Whangai Formation. It consist of three members, the Maungataniwha Sandstone Member, the Mutuera Member and the Houpapa Member. It is named for Tahora Station, south of Matawai in the Gisborne Region. The aptly named Maungataniwha Sandstone Member is known for its rich reptile fossil remains, first investigated by amateur palaeontologist Joan Wiffen.

The Mexcala Formation is a Late Cretaceous geologic formation in Guerrero state, southern Mexico.

The Ravenscrag Formation is a stratigraphic unit of early Paleocene age in the Western Canada Sedimentary Basin. It was named for the settlement of Ravenscrag, Saskatchewan, and was first described from outcrops at Ravenscrag Butte near the Frenchman River by N.B. Davis in 1918.

<span class="mw-page-title-main">Ojo Alamo Formation</span> Geologic formation in New Mexico

The Ojo Alamo Formation is a geologic formation in New Mexico spanning the Mesozoic/Cenozoic boundary. Non-avian dinosaur fossils have controversially been identified in beds of this formation dating from after the Cretaceous–Paleogene extinction event, but these have been explained as either misidentification of the beds in question or as reworked fossils, fossils eroded from older beds and redeposited in the younger beds.

The Tlayúa Formation is an Early Cretaceous geological formation near Tepexi de Rodríguez, Puebla.

This list, 2013 in molluscan paleontology, is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that have been described during the year 2013.

<i>Cipactlichthys</i> Extinct genus of ray-finned fishes

Cipactlichthys is a genus of extinct marine holostean fish from the Lower Cretaceous of Mexico, distantly related to modern bowfins. The only known species is Cipactlichthys scutatus.

<i>Baluchicardia</i> Extinct genus of bivalves

Baluchicardia is an extinct genus of fossil saltwater clams, marine bivalve molluscs in the family Carditidae. These clams were facultatively mobile infaunal suspension feeders.

The Nanjemoy Formation is a geologic formation pertaining to both the Wilcox Group and the Pamunkey Group of the eastern United States, stretching across the states of Virginia, Maryland, and District of Columbia. The formation crops out east of the Appalachians and dates back to the Paleogene period. Specifically to the Ypresian stage of the Eocene epoch, about 55 to 50 Ma or Wasatchian in the NALMA classification, defined by the contemporaneous Wasatch Formation of the Pacific US coast.

References

  1. 1 2 3 Potrerillos Formation at Fossilworks.org
  2. 1 2 3 4 Vega & Perrilliat, 1995

Bibliography