The Langston Formation is a
geologic formation in
Idaho and
Utah. It preserves
fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
dating back to the
Cambrian
The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...
period. The formation is composed of bluish-gray limestone, weathering to a buff color, often with rounded edges.
[Mansfield, George Rogers]
Geography, Geology, and Mineral Resources of Part of Southeastern Idaho
U.S. Government Printing Office, 1927, p. 53.
Blacksmith Fork is the type locality, and includes more fossils than the Idaho sections.
The Langston Formation includes the fossilerous
Spence Shale
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 ...
.
Geology
See also
*
List of fossiliferous stratigraphic units in Idaho
This article contains a list of fossil-bearing stratigraphic units in the state of Idaho, U.S.
Sites
See also
* Paleontology in Idaho
References
*
{{DEFAULTSORT:Fossiliferous stratigraphic units in Idaho
Idaho
Stratigraphic units
A s ...
*
Paleontology in Idaho
References
*
Cambrian Idaho
Cambrian geology of Utah
Cambrian southern paleotropical deposits
{{Cambrian-stub