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 Gros Ventre Formation is a geologic formation in Wyoming, USA. It preserves fossils dating back to the Cambrian period. The Gros Ventre consists of three main members; the Wolsey Shale, the Death Canyon Limestone, and the Park Shale.
The Dotsero Formation is a geologic formation in Colorado. It preserves fossils dating back to the Cambrian period.
The Spence Shale is the middle member of the Langston Formation in southeastern Idaho and northeastern Utah. It is exposed in the Bear River Range, the Wasatch Range and the Wellsville Mountains. It is known for its abundant Cambrian trilobites and the preservation of Burgess Shale-type fossils.
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 Nopah Formation is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period.
The Orr Formation is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period.
The Pioche Formation is a geologic formation in Utah and Nevada. It preserves fossils dating back to the Cambrian period.
The Ute Limestone is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period.
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 Chisholm Formation is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period.
The Dunderberg Shale is a geologic formation in Nevada and Utah.
The Ely Limestone is a geologic formation in Nevada and Utah. It preserves fossils dating back to the Carboniferous period.
The Swan Peak Formation is a geologic formation in Utah. It preserves fossils dating back to the Ordovician period.
The Lincoln Peak Formation is a geologic formation in Nevada. It preserves fossils dating back to the Cambrian period.
The Zabriskie Quartzite is a Cambrian Period geologic formation of the northern Mojave Desert, in Inyo County, California and Nye County, Nevada.
The Swasey Limestone is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period.
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.
Utah, 
Nevada 
United States 
