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As such, the Wheeler Shale also represents a Konservat-Lagerstätten. [4] Together with the Marjum Formation and lower Weeks Formation, the Wheeler Shale forms 490 to 610 m (1,610 to 2,000 ft) of limestone and shale exposed in one of the thickest, most fossiliferous and best exposed sequences of Middle Cambrian rocks in North America. [5]
The Marjum Formation is a Cambrian geological formation that overlies the Wheeler Shale in the House Range, Utah. [1] [3] It is named after its type locality, Marjum Pass, and was defined in 1908. [2]
Asaphiscus wheeleri, 37 mm long. Asaphiscus are average size trilobites of (up to 8 centimetres or 3.1 inches) with a rather flat calcified dorsal exoskeleton of inverted egg-shaped outline, about 1 + 1 ⁄ 2 × longer than wide, with the widest point near the back of the headshield (or cephalon).
Geological formations consist of rock that was deposited during a specific period of time. They usually extend for large areas, and sometimes there are different important sites in which the same formation is exposed. Such sites may have separate entries if they are considered to be more notable than the formation as a whole.
A Burgess Shale-type biota coeval in age with the more famous Wheeler Shale and Marjum Formation. [51] Wheeler Shale (House Range) 504 Ma Western Utah, US A world-famous locality known for its prolific agnostid and Elrathia kingii trilobite remains. Varied soft bodied organisms are also locally preserved, including Naraoia, Wiwaxia and ...
Perspicaris (from the Latin perspicax, meaning “sharp-sighted,” and caris, “crab/shrimp”) an extinct genus of bivalved arthropod from the Cambrian period. Fossils have been found in North America, primarily the Burgess Shale of British Columbia, Canada but also possibly the Wheeler Shale, Marjum Formation, Pioche Shale and Bloomington Formation.
Royal Dutch Shell , along with its partner Gazprom Neft, recently began a pilot well project to explore the potential of the Bazhenov formation, which could be the world's largest deposit of shale ...
The stage was also named after the Drum Mountains. The section is an outcrop of the Wheeler Formation, a succession of calcareous shales. The precise base of the Drumian is a laminated limestone 62 m (203 ft) above the base of the Wheeler Formation. [5]