| Buelna Formation | |
|---|---|
| Stratigraphic range: Cambrian | |
| Type | Formation |
| Underlies | Cerro Prieto Formation [1] |
| Overlies | Proveedora Quartzite [1] |
| Location | |
| Country | Mexico |
The Buelna Formation is a geological formation in Mexico. It preserves fossils dating back to the Cambrian period. [2]
The Davis Formation is a geologic formation in Indiana and Missouri. It preserves fossils dating back to the Cambrian period.
The Eau Claire Formation is a geologic formation in the north central United States. It preserves trilobite fossils from the Cambrian Period.
The Rome Formation is a geologic formation in Alabama, Georgia, and Tennessee. It preserves fossils dating back to the Cambrian period.
The Kinzers Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Cambrian Period.
The Conasauga Formation is a geologic formation in Georgia. It preserves fossils dating back to the Cambrian period.
The Franconia Formation is a geologic formation in the upper mid-western United States, with outcroppings found in Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, Ohio, and Wisconsin. It preserves fossils dating back to the Cambrian period. It was named the Franconia Formation due to the first published documentation of exposures in vicinity of Franconia, Minnesota in the 1897 Ph.D. dissertation by Charles P. Berkley at the University of Minnesota titled Geology of the St. Croix Dalles. The Franconian stratigraphic stage was named after this formation.
The Jordan Sandstone is a geologic formation in Wisconsin. It preserves fossils dating back to the Cambrian period.
The Dotsero Formation is a geologic formation in Colorado. It preserves fossils dating back to the Cambrian period.
The Sawatch Formation is a geologic formation in eastern Colorado. It is a sedimentary sequence formed approximately 530 million years ago during a marine transgression. It preserves fossils dating back to the Cambrian period. It is composed of glauconitic and quartz-rich sandstone.
The Langston Formation is a geologic formation in Idaho and Utah. It preserves fossils dating back to the Cambrian period. The formation is composed of bluish-gray limestone, weathering to a buff color, often with rounded edges.
The Weeks Formation is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period and more specifically the Guzhangian stage. Its upper part has yielded a diverse fauna dominated by trilobites and brachiopods, but also comprising various soft-bodied organisms, such as Falcatamacaris. As such, it is regarded as a Konservat-Lagerstätte.
The Dunderberg Shale is a geologic formation in Nevada and Utah.
The Carrara Formation is a geologic formation in Nevada. It preserves fossils dating back to the Cambrian period.
The Puerto Blanco Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cambrian period.
The San José de Gracia Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cambrian period.
The La Ciénega Formation is a geologic formation in Mexico. It preserves fossils dating back to the Carboniferous period.
The Clemente Formation is a geologic formation in Mexico. It preserves fossils dating back to the Ediacaran period.
The Gamuza Formation is a geologic formation in Mexico. It preserves fossils dating back to the Ediacaran period.
The Mesón Formation is a geologic formation in Mexico. It preserves fossils dating back to the Paleogene period.
The Henson Gletscher Formation is a geologic formation in Greenland. It preserves fossils dating back to the Cambrian period. It is named after the Henson Glacier (Greenland).
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