| Guanjuato Conglomerate | |
|---|---|
| Stratigraphic range: Paleogene | |
| Type | Formation |
| Location | |
| Country | Mexico |
The Guanajuato Conglomerate is a geologic formation in Mexico. It preserves fossils dating back to the Paleogene period.
The Tecocoyunca Group is a Mesozoic geologic formation in Mexico. Fossil sauropod tracks have been reported from the formation.
The Revista Mexicana de Ciencias Geológicas is a triannual peer-reviewed open-access scientific journal published by the National Autonomous University of Mexico, Sociedad Geológica Mexicana, Instituto Nacional de Geoquímica, and Sociedad Mexicana de Paleontología. It covers the field of geology and related Earth sciences, primarily on issues that are relevant to Latin America and Mexico. It was established in 1976 and the editors-in-chief are Angel F. Nieto Samaniego and Peter Schaaf.
The Jackson Bluff Formation is a geologic formation in Florida. It preserves fossils dating back to the Neogene period.
The Goodland Limestone or Goodland Formation is a geologic formation in Arkansas and Texas. It preserves fossils dating back to the Cretaceous period.
The Camp Springs Formation is a geologic formation in the Dockum Group of Texas. It preserves fossils dating back to the Late Triassic. It has also been known as the Camp Springs Conglomerate or Camp Springs Member. The unit was originally named for an unknown locality in West Texas, and was later used in reference to sandstone and conglomerate deposits in Scurry County. It is likely equivalent to the basal beds of the Santa Rosa Formation, and some authors have suggested abandoning the usage of the term "Camp Springs Formation" and similar names.
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 Cúpido Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cretaceous period.
The Olmos Formation is a geologic formation in Mexico. It preserves fossils of plants, hadrosaurs, ceratopsians, tyrannosaurs and the turtle Palauchelys montellanoi dating back to the Cretaceous period.
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 Conglomerado Cualac is a geologic formation in Mexico. First described by Guzmán in 1959, under the name Cuarcita Cualac. Later, Erben (1956) gave it their actual name. It consist of thick beds of a hard, white and sometimes yellowish conglomerate with a cuarcitic matrix. This conglomerate compounds almost exclusively of milky quartz pebbles between .5 and 5 centimeters of diameter. It also presents, in less quantity, pebbles of schist, gneiss, and tuff. Its thickness varies between 30 and more than 200 meters. It preserves fossils dating back to the Jurassic period.
The La Caja Formation is a geologic formation in Mexico. It preserves fossils dating 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.
The Mesón Formation is a geologic formation in Mexico. It preserves fossils dating back to the Paleogene period.
The El Bosque Formation is a geologic formation in Mexico. It preserves fossils of plants, vertebrates, invertebrates and calcareous algae dating back to the Eocene period.
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