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The Green River Formation is an Eocene geologic formation that records the sedimentation in a group of intermountain lakes in three basins along the present-day Green River in Colorado, Wyoming, and Utah. The sediments are deposited in very fine layers, a dark layer during the growing season and a light-hue inorganic layer in the dry season.
The Green River Formation is a geological formation located in the Intermountain West of the United States, in the states of Colorado, Utah, and Wyoming.It comprises sediments deposited during the Early Eocene in a series of large freshwater lakes: Lake Gosiute, Lake Uinta, and Fossil Lake (the last containing Fossil Butte National Monument).
Mioplosus is an extinct genus of percid fish that lived from the early to middle Eocene (about 56 to 33.9 million years ago). [1] Five species of the genus has been described, Mioplosus labracoides is found in the Green River Formation Lagerstätte. Mioplosus has numerous extant relatives in Northern Hemisphere fresh- and brackish water, as ...
Fossils of Asterotrtygon were found in Fossil Butte, Wyoming.. Before the description of Asterotrygon, Heliobatis was the only known stingray in the Green River Formation. . American paleontologist Othniel Charles Marsh named Heliobatis radians in 1877, and Xiphotrygon acutidens and Palaeodasybatis discus were subsequently named from the formation in 1879 and 1947, respecti
Knightia is an extinct genus of clupeid bony fish that lived in the freshwater lakes and rivers of North America and Asia during the Eocene epoch. The genus was erected by David Starr Jordan in 1907, in honor of the late University of Wyoming professor Wilbur Clinton Knight, "an indefatigable student of the paleontology of the Rocky Mountains." [1]
Cyclurus. Cyclurus (Ancient Greek for "rounded tail") is an extinct genus of freshwater amiid ray-finned fish known from the Late Cretaceous to the Early Oligocene across much of the Northern Hemisphere. [1] It is thought to be the closest relative of the extant bowfins in the genus Amia, although species of Cyclurus were significantly smaller ...
September 4, 2024 at 3:12 AM. Fossils predating the dinosaurs by hundreds of millions of years have been found in a paving stone in a Scottish city centre. Thousands of people have walked over the ...
P. serrata Cope, 1877. Cockerellites liops. Priscacara, is a genus of extinct temperate bass [1] described from Early to Middle Eocene fossils. It is characterized by a sunfish-like body and its stout dorsal and anal spines. The genus is best known from the Green River Formation of Wyoming, Utah and Colorado.
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