Green River Formation exposed in the cliffs at Fossil Butte
Type
Geological formation
Lithology
Primary
varied
Other
see text
Location
Region
Rocky Mountains: Colorado Utah Wyoming
Country
United States
Type section
Named for
Green River
Heliobatis radians (stingray), Green River Formation, Fossil Butte National Monument.
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. Each pair of layers is called a varve and represents one year. The sediments of the Green River Formation present a continuous record of six million years. The mean thickness of a varve here is 0.18 mm, with a minimum thickness of 0.014 mm and maximum of 9.8 mm.[1]
The sedimentary layers were formed in a large area named for the Green River, a tributary of the Colorado River. The three separate basins lie around the Uinta Mountains (north, east, and south) of northeastern Utah:
an area in northwestern Colorado east of the Uintas
a larger area in the southwest corner of Wyoming just north of the Uintas known as Lake Gosiute
the largest area, in northeastern Utah and western Colorado south of the Uintas, known as Lake Uinta
Fossil Butte National Monument in Lincoln County, Wyoming is in a part of the formation known as Fossil Lake because of its abundance of exceptionally well preserved fish fossils.
^Bradley, W. H. The varves and climate of the Green River epoch: U.S. Geol. Survey Prof. Paper 158, pp 87–110, 1929.
and 28 Related for: Green River Formation information
The GreenRiverFormation is an Eocene geologic formation that records the sedimentation in a group of intermountain lakes in three basins along the present-day...
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found in the remains of large lakes such as the deposits of the GreenRiverFormation of Wyoming and Utah, USA. Oil-shale deposits formed in the shallow...
46 to 51 million years old and occur in the Laney Member of the GreenRiverFormation. Evidence suggests that the Elimia tenera were deposited nearshore...
more extensive geologic record. Carotane was first measures in the GreenRiverFormation. It was discovered using gas-liquid chromatography and GC/MS. The...
Grande, Lance (2011). "Stem Parrots (Aves, Halcyornithidae) from the GreenRiverFormation and a Combined Phylogeny of Pan-Psittaciformes". Journal of Paleontology...
(Cockerell) MacGinitie GreenRiverFormation, North America (Colorado) Eocene Malus pseudocredneria (Cockerell) MacGinitie GreenRiverFormation, North America...
Formation and overlying GreenRiverFormation. The name was first used by P.T. Walton in 1944 for strata below the GreenRiverFormation at the base of the...
S. from Searles Lake, San Bernardino County, California; in the GreenRiverFormation, Colorado and Utah; in the Tincalayu deposit, Salar del Hombre Muerto...
encountered. Then, in 1958, moissanite was found in the upper mantle GreenRiverFormation in Wyoming and, the following year, as inclusions in the ultramafic...
California; the GreenRiverFormation of Wyoming and Utah; the Makgadikgadi Pans in Botswana and in the Nile Valley in Egypt. The trona near GreenRiver, Wyoming...
and the technology used. About one sixth of the oil shales in the GreenRiverFormation have a relatively high yield of 25 to 100 US gallons (95 to 379 L;...
fossil species, Stegobium defunctus is known from the Eocene aged GreenRiverFormation of Wyoming. The oldest records of the beetle as a pest are known...
was described by Storrs Olson in 1987 from a fossil found in the GreenRiverFormation in Wyoming. The species, Prefica nivea, was probably not adapted...
million years ago. Two specimens of Onychonycteris were found in the GreenRiverFormation in 2003, and placed in a new family when the discovery was published...
related to Gruiformes and Charadriiformes. It is known from the GreenRiverFormation (Early Eocene) of Colorado, Wyoming, and Utah. Musser, G. & Clarke...
has been based in part on some fibrous strands recovered from a GreenRiverFormation deposit at Roan Creek, Colorado, which were initially believed to...
Monument, the formation crops out underlying the GreenRiverFormation. In the Silt Quadrangle of Garfield County, Colorado, the formation overlies the...
The mineral is known only from the Parachute Creek Member of the GreenRiverFormation. It has been known from the Uinta Basin in Utah since its discovery...
Asterotrygon known from the GreenRiverFormation. A diversity of stingray fossils is known from the Eocene Monte Bolca formation from Italy, including the...
specimens, among the best preserved bat fossils, are known from the GreenRiverFormation of North America. The best known species is I. index. Fragmentary...
wileyi) from the GreenRiverFormation. Both species are common in mass death assemblages from the "Lake Uinta" division of the formation. The largest species...
found in the remains of large lakes such as the deposits of the GreenRiverFormation of Wyoming and Utah, USA. Oil-shale deposits formed in the shallow...
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Wyoming
United States