The Kinzers Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Cambrian Period.
The Tomstown Dolomite or Tomstown Formation is a geologic formation in Maryland, Pennsylvania, Virginia and West Virginia. It preserves fossils dating to the Cambrian Period.
The Wolsey Shale is a geologic formation in Montana. It preserves fossils dating back to the Cambrian period.
The Belle Fourche Formation or Belle Fourche Shale is a fossiliferous early Late-Cretaceous geologic formation classification in Wyoming. Named for outcrops in Belle Fourche River, Wyoming, this unit name is also used in Montana, North Dakota, and South Dakota.
The Park Shale is a geologic formation in Wyoming. It preserves fossils dating back to the Cambrian period.
The Open Door Limestone is a geologic formation in Wyoming. It preserves fossils dating back to the Cambrian period.
The Gallatin Formation is a geologic formation in Wyoming and Montana. It preserves fossils dating back to the Cambrian period.
The DuNoir Limestone is a geologic formation in Wyoming, United States. It preserves fossils dating back to the Cambrian period.
The Dry Creek Shale is a geologic formation in Wyoming. It preserves fossils dating back to the Cambrian period.
The Aspen Shale is a geologic formation in Wyoming, United States. It preserves fossils dating back to the Cretaceous period.
The Hailey Shales Formation is a geologic formation in Wyoming. It preserves fossils dating back to the Cretaceous period.Plesiopleurodon was found in this formation.
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 Dunderberg Shale is a geologic formation in Nevada and Utah.
The Secret Canyon Shale is a geologic formation in Nevada. It preserves fossils dating back to the Cambrian period.
The Tybo Shale is a geologic formation in Nevada. It preserves fossils dating back to the Cambrian period.
The Chisholm Shale is a geologic formation in Nevada. It preserves fossils dating back to the Cambrian period.
The Wood Canyon Formation is a geologic formation in the northern Mojave Desert of Inyo County, California and Nye County and Clark County, Nevada.
The Latham Shale is a geologic formation in California. It preserves fossils dating back to the Cambrian period.
Cordylodus is an extinct genus of conodonts in the family of Cordylodontidae.
