Just Lunch Dating In Green River Wy

Green River Formation
Stratigraphic range: Eocene, 53.5–48.5 Ma
Green River Formation exposed in the cliffs at Fossil Butte
TypeGeological formation
Lithology
Primaryvaried
Othersee text
Location
RegionRocky Mountains:
Colorado
Utah
Wyoming
CountryUnited States
Type section
Named forGreen River
  1. Just Lunch Dating In Green River Wyoming
  2. Just Lunch Dating In Green River Wy Zip Code
  3. Just Lunch Dating In Green River Wy Real Estate
  4. Just Lunch Dating In Green River Wy Weather 10 Day Forecast
  5. Just Lunch Dating In Green River Wy Weather
  6. Just Lunch Dating In Green River Wy Police Dept
Heliobatis radians (stingray), Green River Formation, Fossil Butte National Monument.

Pike River re-entry team reaches farthest point into mine drift it will go 'Crap pay and horrible conditions' — Midwives at breaking point in capital DHB. Castle Rock, Green River Jimmy Emerson, DVM/Flickr It's hard to picture the high desert of Wyoming as a land of lakes, but many of the odd rock formations here attest to the fact that a lot of the region was submerged in prehistoric times. Best Dining in Green River, Sweetwater County: See 656 Tripadvisor traveler reviews of 21 Green River restaurants and search by cuisine, price, location, and more. Operator (Former Employee) - Green River, WY 82935 - September 14, 2017 Loved my hours I worked and the people I worked with. Had good insurance for the family and great bonuses given out. Single Green River Guys From Wyoming Interested In Wyoming Dating. Are you Looking for Green River Guys From Wyoming? Check out the the profile previews below and you may just see if you can find your ideal date. Start a conversation and arrange to meetup later tonight. Our site has 100's of other members waiting to date somebody just like you!

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:

Dating

  • 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.

Lithology and formation[edit]

Areas of oil shale of the Green River Formation, Colorado, Utah, and Wyoming (USGS)

The formation of intermontane basin / lake environments during the Eocene resulted from mountain building and uplift of the Rocky Mountains (late CretaceousSevier orogeny and the PaleogeneLaramide orogeny). Tectonic highlands supplied the Eocene sedimentary basins with sediment from all directions: the Uinta Mountains in the center; the Wind River Mountains to the north; the Front Range, Park Range and Sawatch Range of the Colorado Rockies to the east; the Uncompahgre Plateau and the San Juan Mountains to the south and finally, the Wasatch Mountains of Utah and the ranges of eastern Idaho to the west.

The lithology of the lake sediments is varied and includes sandstones, mudstones, siltstones, oil shales, coal beds, saline evaporite beds, and a variety of lacustrine limestones and dolomites. Volcanic ash layers within the various sediments from the then active Absaroka Volcanic field to the north in the vicinity of Yellowstone and the San Juan volcanic field to the southeast provide dateablehorizons within the sediments.

The trona (hydrated sodium bicarbonate carbonate) beds of Sweetwater County, Wyoming are noted for a variety of rare evaporite minerals. The Green River Formation, is the type locality for eight rare minerals: bradleyite, ewaldite, loughlinite, mckelveyite-(Y), norsethite, paralabuntsovite-Mg, shortite and wegscheiderite. It also has a natural occurrence of moissanite (SiC) and 23 other valid mineral species.[2]

Cyclicity[edit]

The beds display a pronounced cyclicity, with the precession, obliquity, and eccentricity orbital components all clearly detectable. This enables the beds to be internally dated with a high degree of accuracy, and astrochronological dates agree very well with radiometric dates.[3]

Fossil zones[edit]

Diplomystus (left) and Knightia (right), two fossil fish from one of the lake beds in the Green River Formation

Within the Green River Formation of southwest Wyoming in the area known as Fossil Lake, two distinct zones of very fine-grained lime muds are particularly noted for preserving a variety of complete and detailed fossils. These layers are an Eocene Lagerstätte, a rare place where conditions were right for a rich accumulation of undisturbed fossils. The most productive zone—called the split fish layer—consists of a series of laminated or varved lime muds about 6 ft (1.8 m) thick, which contains abundant fish and other fossils. These are easily split along the layers to reveal the fossils. This thin zone represents some 4000 years of deposition. The second fossil zone, the 18 inch layer, is an unlaminated layer about 18 in (46 cm) thick that also contains abundant detailed fossils, but is harder to work because it is not composed of fissile laminae.

Diplomystus dentatus Prepared by Fossil Shack from the Green River Formation Split Fish Layer

The limestone matrix is so fine-grained that fossils include rare soft parts of complete insects and fallen leaves in spectacular detail. More than twenty-two orders of insects are represented in the Green River collection at the Smithsonian Institution in Washington, D.C., alone.

Fish fossils of Diplomystus and Knightia are found in Fossil Lake but not in Lake Gosiute. Only Lake Gosiute has fossils of catfish (Ictaluridae and Hypsidoridae) and suckers (Catostomidae). The catfish are found mostly in the deepest parts of the lake.[4][5]

Unidentified bird from the Green River Formation with preserved feathers
Stromatolite fossil from the Eocene Lake Gosuite, Laney Member, Green River Formation of south-western Wyoming

The various fossil beds of the Green River Formation span a 5 million year period, dating to between 53.5 and 48.5 million years old.[6] This span of time includes the transition between the moist early Eocene climate and the slightly drier mid-Eocene. The climate was moist and mild enough to support crocodiles, which do not tolerate frost, and the lakes were surrounded by sycamore ( e.g. Platanus wyomingensis[7]) forests. As the lake configurations shifted, each Green River location is distinct in character and time. The lake system formed over underlying river deltas and shifted in the flat landscape with slight tectonic movements, receiving sediments from the Uinta highland and the Rocky Mountains to the east and north. The lagerstätten formed in anoxic conditions in the fine carbonate muds that formed in the lakebeds. Lack of oxygen slowed bacterial decomposition and kept scavengers away, so leaves of palms, ferns and sycamores, some showing the insect damage they had sustained during their growth, were covered with fine-grained sediment and preserved. Insects were preserved whole, even delicate wing membranes and spider spinnerets.

Vertebrates were preserved too, including the scutes of Borealosuchus, the crocodile that was an early clue to the mild Eocene climate of Western North America. Fish are common. The fossils of the herring-like Knightia, sometimes in dense layers, as if a school had wandered into anoxic water levels and were overcome, are familiar to fossil-lovers and are among the most commonly available fossils on the commercial market. There were two genera of indigenous freshwater stingray, Heliobatis and Asterotrygon. Approximately sixty vertebrate taxa in all have been found at Green River. Besides fishes they include at least eleven species of reptiles, and some birds and one armadillo-like mammal, Brachianodon westorum, with some scattered vertebrae of others, like the dog-sized Meniscotherium and Notharctus, one of the first primates. The earliest known bats (Icaronycteris index,[8] and Onychonycteris finneyi[9]), already full-developed for flight, are found here. Even a snake, Boavus idelmani, found its way into a lake and was preserved in the mudstone.

Discovery of the fossil beds[edit]

The first documented records of (invertebrate) fossils from what is now called the Green River Formation are in the journals of early missionaries and explorers such as S. A. Parker, 1840, and J. C. Fremont, 1845.[10] Geologist Dr. John Evans collected the first fossil fish, described as Culpea humilis (later renamed Knightia eocaena), from the Green River beds in 1856.[11]Edward Drinker Cope collected extensively from the area and produced several publications on the fossil fish from 1870 onwards.[10]Ferdinand Vandeveer Hayden (geologist-in-charge of the United States Geological and Geographical Survey of the Territories, the forerunner of the United States Geological Survey) first used the name 'Green River Shales' for the fossil sites in 1869.[10]

Millions of fish fossils have been collected from the area, commercial collectors operating from legal quarries on state and private land have been responsible for the majority of Green River vertebrate fossils in public and private collections all over the world.[12]

Green

Oil shale[edit]

Oil Shale from the Mahogany Zone of the Green River Formation, Colorado. Weathered surface on right; fresh surface on left.
Green River Formation Oil Gas Fields within the Uinta Basin and Piceance Basin

The Green River Formation contains the largest oil shale deposit in the world. It has been estimated that the oil shale reserves could equal up to 3 trillion barrels (480 billion cubic metres) of shale oil, up to half of which may be recoverable by shale oil extraction technologies (pyrolysis, hydrogenation, or thermal dissolution of kerogen in oil shale).[13][14][15][16][17] However, the estimates of recoverable oil has been questioned, back in 2013, by geophysicist Raymond T. Pierrehumbert, who argued that the technology for recovering oil from the Green River oil shale deposit had not been developed and had not been profitably implemented at any significant scale.[18]

Green River oil shale is lacustrine type lamosite. The organic matter is from blue-green algae (cyanobacteria).[14]

Notable mineral deposits[edit]

The unusual chemistry of the lakes in which it was deposited makes the Green River Formation a major source of sodium carbonate. In southwest Wyoming the formation contains the world's largest deposits of trona, and in Colorado, the world's largest deposits of nahcolite.[19] Another unusual mineral, currently only known from the Parachute Creek member is the crystalline nickel porphyrin mineral abelsonite.[20]

See also[edit]

  • Florissant Formation (Florissant Fossil Beds National Monument), a similarly fossiliferous, but younger freshwater Eocene formation in the Colorado Rocky Mountains.
  • List of fossil sites(with link directory)

References[edit]

  1. ^Bradley, W. H. The varves and climate of the Green River epoch: U.S. Geol. Survey Prof. Paper 158, pp 87–110, 1929.
  2. ^'Green River Formation locality data from Mindat'. Retrieved 11 Jun 2009.
  3. ^Meyers, S. R. (2008), 'Resolving Milankovitchian controversies: The Triassic Latemar Limestone and the Eocene Green River Formation'(PDF), Geology, 36 (4): 319–322, Bibcode:2008Geo..36.319M, doi:10.1130/G24423A.1, archived from the original(PDF) on 2008-12-16, retrieved 24 Apr 2008
  4. ^Morton, Glenn R., 2003, Creationist Misuse of the Green River FormationArchived 2009-02-04 at the Wayback Machine, accessed May 2, 2009
  5. ^Grande, Lance; Buchheim, Paul (1994), 'Paleontological and Sedimentological Variation in Early Eocene Fossil Lake', Contributions to Geology, University of Wyoming, 30: 45
  6. ^Smith, M. E., Singer, B., & Carroll, A. (2003). 40Ar/39Ar geochronology of the Eocene Green River Formation, Wyoming. Geological Society of America Bulletin, 115(5), 549-565.
  7. ^https://ucmp.berkeley.edu/tertiary/eoc/greenriver.html
  8. ^Jepsen, G. L. (1966), 'Early Eocene bat from Wyoming', Science, 154 (3754): 1333–9, Bibcode:1966Sci..154.1333J, doi:10.1126/science.154.3754.1333, PMID17770307
  9. ^Nancy B. Simmons; Kevin L. Seymour; Jorg Habersetzer; Gregg F. Gunnell (2008), 'Primitive Early Eocene bat from Wyoming and the evolution of flight and echolocation', Nature, 451 (7180): 818–21, Bibcode:2008Natur.451.818S, doi:10.1038/nature06549, hdl:2027.42/62816, PMID18270539
  10. ^ abcLance Grande (1984), 'Paleontology of the Green River Formation, with a review of the fish fauna', Bulletin of the Wyoming State Geological Survey, Laramie, Wyoming, 63 2nd ed.
  11. ^J. Leidy (1856), 'Notice of some remains of fishes discovered by Dr. John E. Evans', Proc. Acad. Nat. Sci. Phila.: 256
  12. ^Lance Grande (1984) Paleontology of the Green River Formation, with a review of the fish fauna. Geological Survey of Wyoming Bull.63, p. 10
  13. ^GAO: Unconventional Oil and Gas Production
  14. ^ abDyni, John R. (2006). 'Geology and resources of some world oil shale deposits. Scientific Investigations Report 2005–5294'(PDF). United States Department of the Interior, United States Geological Survey. Retrieved 9 Jul 2007.Cite journal requires |journal= (help)
  15. ^Annual Energy Outlook 2006(PDF). Energy Information Administration. Feb 2006. p. 53. Retrieved 18 Apr 2008.
  16. ^Andrews, Anthony (13 Apr 2006). 'Oil Shale: History, Incentives, and Policy'(PDF). Congressional Research Service. Retrieved 25 Jun 2007.Cite journal requires |journal= (help)
  17. ^'NPR's National Strategic Unconventional Resource Model'(PDF). United States Department of Energy. Apr 2006. Retrieved 9 Jul 2007.Cite journal requires |journal= (help)
  18. ^Pierrehumbert, Raymond. ''The Myth of 'Saudi America''. Slate. Retrieved February 6, 2013.
  19. ^George I. Smith and others (1973) Evaporites and brines, in United States Mineral Resources, US Geological Survey, Professional Paper 820, p. 206.
  20. ^Mason, G. M.; Trudell, L. G.; Branthaver, J. F. (1989). 'Review of the stratigraphic distribution and diagenetic history of abelsonite'. Organic Geochemistry. 14 (6): 585–594. doi:10.1016/0146-6380(89)90038-7.(subscription required)

Further reading[edit]

  • Geologic Atlas of the Rocky Mountain Region, Rocky Mountain Association of Geologists, 1972, Denver Colorado
  • King, Philip B., 1977, The Evolution of North America, Revised edition, Princeton University Press
  • Gaggiano, Tom, The Green River Formationhttp://www.fossilnews.com/2000/grnrv/grnrv.html[permanent dead link] Accessed March 18, 2006.
  • Carrol, Alan, 2001, Green River research project, http://www.geology.wisc.edu/~carroll/green_river.html Accessed March 18, 2006.

External links[edit]

Wikimedia Commons has media related to Green River Formation.
  • Green River Formation UCMP Berkeley website
  • Green River Formation and Shale Oil, Research Brief by Rand [1]
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Green_River_Formation&oldid=990773247'

City

Sorted by date Results 1 - 25 of 1177


Board approves BLM application for land lab

Students in Green River High School’s FFA program may get the chance to work on a land lab if approved by the Bureau of Land Management. Land labs are parcels of land set aside for various studies in agriculture or ecology The lab would be located..

This won't hurt at all

Vehicles donated to GRHS

The Green River High School automotive department will get three vehicles to work on courtesy of Genesis Alkali. One of the three vehicles was delivered last week, while the other two will be sent in..

Woman sentenced to prison for abuse

GREEN RIVER (Wyoming News Exchange) — A Rock Springs woman was sentenced to prison on Thursday afternoon after pleading no contest to second-degree sexual abuse of a minor. Kaila Marie Krotzer received a seven- to 10-year prison sentence during a c..

Nomis sentencing delayed

A Monday hearing to sentence Stephanie Nomis for her part in the embezzlement of Green River Fire Department Foundation funds was continued after Nomis said she did not recall receiving a copy of her..

Make-A-Wish continues in 2021

Not even a pandemic could deter students from Green River High School from hosting the annual Make-A-Wish fundraising events this year. While the fundraising period has been condensed into a single..

City seeks input on disc golf proposal

The Green River City Council seeks comments from residents regarding a proposed 18-hole disc golf course in the Scott’s Bottom Nature Area. The idea was presented to the Council by Kevin King and Ri..

Fire department sees busy 2020

The Green River Fire Department had a very busy year in 2020, not only with a record number of recorded incidents, but also with several outside elements that occurred. Assistant Fire Chief Larry Erdmann said, “these tasks were accomplished by the..

Lunch is served

Just lunch dating in green river wy weather 10 day forecast

Firefighters honor their own

Four Green River firefighters were honored by their peers for the work and dedication they’ve given to the city’s fire department. Tom Murphy received the department’s Best of the Best award for most training hours logged in 2020. Murphy receiv..

GR bars targeted in recent burglaries

Red Feather owner Fred Trujillo recalls how he felt Sunday morning when he discovered the long-running business on Flaming Gorge Way had been burglarized. “Violated,” he said. “Someone just..

Tax revenue not a concern yet

Revenue from sales tax receipts took a tumble in January, but the figures aren’t a cause of alarm for the City of Green River yet. Chris Meats, the city’s finance director, said revenue is..

District braces itself for budgetary woes

A voluntary separation program initiated by Sweetwater County School District No. 2 has drawn some interest from employees. During an update last week, Jason Fuss, director of human resources for the..

Fixing up Main Street

City contends with line breaks

A waterline break on Flaming Gorge Way underscores a system that’s at the end of its lifespan according to a press release from the city. City streets crews repaired a break in front of Sweetwater Trophies Dec. 28 and breakages have become a yearly..

Swearing in

Muley foundation receives $250,000 in relief funds

The COVID-19 pandemic has impacted residents and businesses throughout the state, but some of the hardest impacts have been seen with some nonprofit organizations. For the Muley Fanatic Foundation,..

Our favorite photo of 2020

Coloring contest winner!

Dating

Former fire chief sentenced

By DAVID MARTIN Publisher The final chapter in the court case against former Green River Fire Department Chief Mike Nomis concluded Thursday after an argued sentencing hearing. Nomis plead guilty to..

Just Lunch Dating In Green River Wyoming

Grinch steals from Mission at Castle Rock

Just Lunch Dating In Green River Wy Zip Code

A week before Christmas, Mission at Castle Rock in Green River was burglarized, with gifts directed to the residents either damaged or stolen from the facility’s Angel Tree. “It was really disheartening .. I don’t know who would have done..

District looks at lowered revenues

Just Lunch Dating In Green River Wy Real Estate

With a loss of funding and a voluntary reduction in school budgets requested by Gov. Mark Gordon, Sweetwater County School District No. 2 is moving forward with a voluntary reduction incentive plan..

Delivering Christmas cheer

Fire investigation continues

Just Lunch Dating In Green River Wy Weather 10 Day Forecast

Little information is available as to the cause of a fatal house fire over Thanksgiving weekend that claimed the life of a Green River resident as investigators continue to look at the remnants of..

Just Lunch Dating In Green River Wy Weather

Apartment fire caused by lit candle

Just Lunch Dating In Green River Wy Police Dept

A Saturday afternoon fire at 370 Upland Way was started by a candle according to Larry Erdmann, assistant fire chief for the Green River Fire Department. The fire department was called to the fire at 1:43 p.m. Saturday after a resident reported..