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Eucommia Montana
''Eucommia montana'' is an extinct species of flowering plant in the family Eucommiaceae. ''E. montana'' is known from fossil fruits found in Eocene deposits of the northwestern United States southeastern British Columbia south to Oregon and east to Montana and Colorado. ''E. montana'' is one of five described fossil species from North America assigned to the modern genus ''Eucommia''. The other species are '' E. constans'', '' E. eocenica'', '' E. jeffersonensis'', and '' E. rowlandii''. History and classification ''Eucommia montana'' was first described by Roland W. Brown in 1940 from the late Eocene Renova Formation which outcrops near Grant in Beaverhead County, Montana. Further collecting in outcrops of Passamari Formation in the Ruby River Basin of southwestern Montana lead to the description of another species, ''Eucommia brownii'' by Herman F. Becker in 1960. This was based on an apparent smaller size to the fruits found in the Passamari fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington State
Washington (), officially the State of Washington, is a state in the Pacific Northwest region of the Western United States. Named for George Washington—the first U.S. president—the state was formed from the western part of the Washington Territory, which was ceded by the British Empire in 1846, by the Oregon Treaty in the settlement of the Oregon boundary dispute. The state is bordered on the west by the Pacific Ocean, Oregon to the south, Idaho to the east, and the Canadian province of British Columbia to the north. It was admitted to the Union as the 42nd state in 1889. Olympia is the state capital; the state's largest city is Seattle. Washington is often referred to as Washington state to distinguish it from the nation's capital, Washington, D.C. Washington is the 18th-largest state, with an area of , and the 13th-most populous state, with more than 7.7 million people. The majority of Washington's residents live in the Seattle metropolitan area, the center of transpo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beaverhead County, Montana
Beaverhead County is the largest county by area in the U.S. state of Montana. As of the 2020 census, the population was 9,371. Its county seat is Dillon. The county was founded in 1865. Much of the perimeter of the county is the Continental Divide, including its entire border with the state of Idaho. The divide heads east into Montana at the county border with Ravalli County, between Lost Trail Pass and Chief Joseph Pass. History The county name is derived from a rock formation, which the Shoshone described as being shaped like a beaver's head. The original county seat was the gold-mining town of Bannack. In 1881 it was moved to Dillon. Geography According to the United States Census Bureau, the county has a total area of , of which is land and (0.3%) is water. It is the largest county in Montana by area. Beaverhead impact structure is in the area. The Big Hole River (formerly called Wisdom River) runs through the county. Adjacent counties * Ravalli County - northwest * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clarno Formation
Clarno may refer to: Locations * Clarno, Oregon * Clarno, Wisconsin ** Clarno (community), Wisconsin *Clarno Township, Lake County, South Dakota Lake County is a county in the U.S. state of South Dakota. As of the 2020 United States Census, the population was 11,059. Its county seat is Madison. The county was formed in 1873. Geography The terrain of Lake County consists of rolling hi ... Other * Clarno Formation, an Eocene geologic formation in Central Oregon * Beverly Clarno, politician in the U.S. state of Oregon {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douglas Pass
Douglas Pass, elevation , is a mountain pass in the Book Cliffs of western Colorado. It is located in Garfield County and is traversed by State Highway 139. The pass divides the watersheds of West Douglas Creek to the north and East Salt Creek to the south. It is named for the Northern Ute, Chief Douglas. The pass is not an especially high summit relative to other Colorado passes, and the road, though reasonably steep on the south side (7%), has no tight spots and only a few switchbacks. The summit gives an unusual view of the northeast face of the La Sal Mountains (twelve peaks over 12,000 feet), away in Utah. The remainder of the drive is basically in valleys following creeks. The Utes had established a trail over the pass, which was subsequently used by European explorers and settlers. The Domínguez–Escalante expedition crossed the pass in 1776. Following the Ute trail, a road over the pass was constructed in the 1920s. The mountain consists of shale strata belon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green River Formation
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.Bradley, W. H. The varves and climate of the Green River epoch: U.S. Geol. Survey Prof. Paper 158, pp 87–110, 1929. 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphotaxon
Paleobotany, which is also spelled as palaeobotany, is the branch of botany dealing with the recovery and identification of plant remains from geological contexts, and their use for the biological reconstruction of past environments (paleogeography), and the evolutionary history of plants, with a bearing upon the evolution of life in general. A synonym is paleophytology. It is a component of paleontology and paleobiology. The prefix ''palaeo-'' means "ancient, old", and is derived from the Greek adjective , . Paleobotany includes the study of terrestrial plant fossils, as well as the study of prehistoric marine photoautotrophs, such as photosynthetic algae, seaweeds or kelp. A closely related field is palynology, which is the study of fossilized and extant spores and pollen. Paleobotany is important in the reconstruction of ancient ecological systems and climate, known as paleoecology and paleoclimatology respectively; and is fundamental to the study of green plant development ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quilchena, British Columbia
Quilchena ( thp, q̓əłmíx) is an unincorporated community located on the south shore of Nicola Lake near the city of Merritt, British Columbia, Canada in that province's Nicola Country region. On the former main route between Merritt and Kamloops, it is now largely bypassed since the construction of the Coquihalla Highway Coquihalla may refer to: *British Columbia Highway 5, also known as Coquihalla highway * Coquihalla River * Coquihalla Pass * Okanagan—Coquihalla, a federal electoral district in British Columbia * Coquihalla Canyon Provincial Park *Coquihalla Ri .... A heritage hotel is the main landmark, lately transformed into a small golf resort. ReferencesBCGNIS listing "Quilchena (locality)" [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coldwater Beds
The Coldwater Beds are a geologic formation of the Okanagan Highlands in British Columbia, Canada. They preserve fossils dating back to the Ypresian stage of the Eocene period, or Wasatchian in the NALMA classification.Coldwater Beds at Fossilworks.org The formation comprises mudstones, shales and s deposited in a |
Klondike Mountain Formation
The Klondike Mountain Formation is an Early Eocene (Ypresian) geological formation located in the northeast central area of Washington state. The formation, named for the type location designated in 1962, Klondike Mountain north of Republic, Washington, is composed of volcanic rocks in the upper unit and volcanics plus lacustrine (lakebed) sedimentation in which a lagerstätte with exceptionally well-preserved plant and insect fossils has been found, along with fossil epithermal hot springs. The formation is the youngest in a group of formations which belong to the Challis Sequence rocks. The formation unconformably overlies rocks of the Eocene Sanpoil Volcanics and much older Triassic and Permian formations. The formation is bounded on its edges by a series of high-angle strike slip faults, which have contained the Klondike Mountain Formation in a series of graben structures, such as the Republic Graben. Public access to a fossiliferous outcrop at the north end of Republic is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ypresian
In the geologic timescale the Ypresian is the oldest age (geology), age or lowest stage (stratigraphy), stratigraphic stage of the Eocene. It spans the time between , is preceded by the Thanetian Age (part of the Paleocene) and is followed by the Eocene Lutetian Age. The Ypresian is consistent with the lower Eocene. Events The Ypresian Age begins during the throes of the Paleocene–Eocene Thermal Maximum (PETM). The Fur Formation in Denmark, the Messel shales in Germany, the Oise amber of France and Cambay amber of India are of this age. The Eocene Okanagan Highlands are an uplands subtropical to temperate series of lakes from the Ypresian. Stratigraphic definition The Ypresian Stage was introduced in scientific literature by Belgium, Belgian geologist André Hubert Dumont in 1850. The Ypresian is named after the Flanders, Flemish city of Ypres in Belgium (spelled ''Ieper'' in Dutch). The definitions of the original stage were totally different from the modern ones. The Ypresi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chronostratigraphy
Chronostratigraphy is the branch of stratigraphy that studies the ages of rock strata in relation to time. The ultimate aim of chronostratigraphy is to arrange the sequence of deposition and the time of deposition of all rocks within a geological region, and eventually, the entire geologic record of the Earth. The standard stratigraphic nomenclature is a chronostratigraphic system based on palaeontological intervals of time defined by recognised fossil assemblages (biostratigraphy). The aim of chronostratigraphy is to give a meaningful age date to these fossil assemblage intervals and interfaces. Methodology Chronostratigraphy relies heavily upon isotope geology and geochronology to derive hard dating of known and well defined rock units which contain the specific fossil assemblages defined by the stratigraphic system. In practice, as it is very difficult to isotopically date most fossils and sedimentary rocks directly, inferences must be made in order to arrive at an age d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
