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Manakacha Formation
The (Upper) Late Pennsylvanian (geology), Pennsylvanian Manakacha Formation is a cliff-former, cliff-forming, sandstone, red-orange geologic unit, formed from an addition of aeolian processes, eolian sand, added to marine transgression deposits, (siltstones, etc.), and found throughout sections of the Grand Canyon. It is one of the lower members of the Supai Group (member two of four major units), with the Supai Group found in other sections of Arizona, especially in the Verde Valley region, or as a basement unit below the Mogollon Rim, just eastwards or part of the basement Supai Group of the southwest & south Colorado Plateau. The Manakacha Formation was laid down (especially in the Grand Canyon). It consists of up to of calcareous sandstone and shaly mudstone. It represents a time when deposition of aeolian processes, aeolian sand became more widespread. The Manakacha was deposited at about the same time as the Weber Formation, Weber Sandstone was deposited in northeast Utah i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watahomigi Formation
The Watahomigi Formation is a geologic formation in the Grand Canyon region of Arizona. It preserves fossils dating back to the Carboniferous period. See also * List of fossiliferous stratigraphic units in Arizona * Paleontology in Arizona References * Geologic formations of Arizona Natural history of the Grand Canyon Carboniferous Arizona Carboniferous System of North America {{Carboniferous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinosaur National Monument
Dinosaur National Monument is an American national monument located on the southeast flank of the Uinta Mountains on the border between Colorado and Utah at the confluence of the Green River (Colorado River tributary), Green and Yampa River, Yampa rivers. Although most of the monument area is in Moffat County, Colorado, the Dinosaur Quarry is located in Utah, north of the town of Jensen, Utah. The nearest Colorado town is Dinosaur, Colorado, Dinosaur while the nearest city is Vernal, Utah. Originally preserved in 1915 to protect its famous Dinosaur Quarry, the monument was greatly expanded in 1938 to include its wealth of natural history. The park's wild landscapes, topography, geology, paleontology, and history make it a unique resource for both science and recreation. The park contains over 800 paleontological sites and has fossils of dinosaurs including ''Allosaurus'', ''Deinonychus'', ''Abydosaurus'', and various Sauropoda, sauropods. The ''Abydosaurus'' consists of a nearl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Facies
In geology, a facies ( , ; same pronunciation and spelling in the plural) is a body of rock with distinctive characteristics. The characteristics can be any observable attribute of rocks (such as their overall appearance, composition, or condition of formation) and the changes that may occur in those attributes over a geographic area. A facies encompasses all the characteristics of a rock including its chemical, physical, and biological features that distinguish it from adjacent rock. The term "facies" was introduced by the Swiss geologist Amanz Gressly in 1838 and was part of his significant contribution to the foundations of modern stratigraphy, which replaced the earlier notions of '' Neptunism''. Walther's law Walther's law of facies, or simply Walther's law, named after the geologist Johannes Walther, states that the vertical succession of facies reflects lateral changes in environment. Conversely, it states that when a depositional environment "migrates" laterally, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conglomerate (geology)
Conglomerate () is a sedimentary rock made up of rounded gravel-sized pieces of rock surrounded by finer-grained sediments (such as sand, silt, or clay). The larger fragments within conglomerate are called clasts, while the finer sediment surrounding the clasts is called the matrix. The clasts and matrix are typically cemented by calcium carbonate, iron oxide, silica, or hardened clay. Conglomerates form when rounded gravels deposited by water or glaciers become solidified and cemented by pressure over time. They can be found in sedimentary rock sequences of all ages but probably make up less than 1 percent by weight of all sedimentary rocks. They are closely related to sandstones in origin, and exhibit many of the same types of sedimentary structures, such as tabular and trough cross-bedding and graded bedding.Boggs, S. (2006) ''Principles of Sedimentology and Stratigraphy.'', 2nd ed. Prentice Hall, New York. 662 pp. Friedman, G.M. (2003) ''Classification of sediments and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinkerton Trail Formation
The Pinkerton Trail Formation is a geologic formation that is found in the Four Corners region of the United States. It contains fossils characteristic of the Atokan and Desmoinesian Ages of the Pennsylvanian. Description The Pinkerton Trail Formation is the lowest member of the Hermosa Group, a group of geological formations deposited in the interior and margins of the Paradox basin during the Pennsylvanian. The Pinkerton Trail Formation consists of gray limestone with occasional beds of black shale. North of Durango, it contains significant clastic sediments. It rests on the Molas Formation and is overlain by the Paradox Formation. Its thickness is up to in the subsurface. The formation is exposed in the Durango, Colorado area and is present in the subsurface in the San Juan basin and the Paradox basin. It was deposited by the advance of the sea (a '' transgression'') over the region, which deposited limestone atop the continental sediments of the Molas Formation. Fos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paradox Formation
In geology, the Paradox Formation Is a Pennsylvanian age formation which consists of abundant evaporites with lesser interbedded shale, sandstone, and limestone. The evaporites are largely composed of gypsum, anhydrite, and halite. The formation is found mostly in the subsurface, but there are scattered exposures in anticlines in eastern Utah and western Colorado. These surface exposures occur in the Black Mesa, San Juan and Paradox Basins and the formation is found in the subsurface in southwestern Colorado, southeastern Utah, northeastern Arizona and northeastern New Mexico. The formation is notable both for its petroleum resources and for its salt tectonics, which are responsible for many distinctive geologic features of the eastern Colorado Plateau. In addition to the anticline valleys, these include the grabens of the Needles District of Canyonlands National Park and the fins and arches of Arches National Park. Description The Paradox Formation was deposited in the Para ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honaker Trail Formation
The Honaker Trail Formation is a Formation (geology), geologic formation in Utah. It preserves fossils dating back to the Carboniferous Period (geology), period. It is a member of the 3-member Hermosa Group and is located above the Paradox Formation in the dramatic site of Goosenecks State Park, Utah, notably Cataract Canyon. It is gray-colored above the multi-layered Paradox deep in Cataract Canyon, riverside. ---- Goosenecks panorama ---- See also * Honaker Trail * List of fossiliferous stratigraphic units in Utah * Paleontology in Utah References * Carboniferous geology of Utah Limestone formations of the United States {{Carboniferous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Durango, Colorado
Durango is the home rule city that is the county seat and the most populous municipality of La Plata County, Colorado, United States. The city population was 19,071 at the 2020 United States census. Durango is the home of Fort Lewis College. History The town was organized from September 1880 to April 1881 by the Denver and Rio Grande Railroad (D&RG, later known as the Denver and Rio Grande Western railroad) as part of their efforts to reach Silverton, Colorado, and service the San Juan mining district, the goal of their "San Juan Extension" built from Alamosa, Colorado. The D&RG chose a site in the Animas Valley close to the Animas River near what is now the Downtown Durango Historic Business District for its railroad facilities following a brief and most likely perfunctory negotiation with the other establishment in the area known as Animas City, to the north. The city was named by ex-Colorado Governor Alexander C. Hunt, a friend of D&RG President William Jackson Pal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermosa Group
The Hermosa Group is a group of geologic formations in Utah and Colorado. It preserves fossils dating back to the Carboniferous period. See also * List of fossiliferous stratigraphic units in Utah * Paleontology in Utah image:Map of USA UT.svg, The location of the state of Utah Paleontology in Utah refers to paleontological research occurring within or conducted by people from the U.S. state of Utah. Utah has a rich fossil record spanning almost all of the geolog ... References * Carboniferous geology of Utah Geologic groups of Utah {{Carboniferous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Esplanade Sandstone
The Lower Permian Esplanade Sandstone is a cliff-forming, resistant sandstone, dark red, geologic unit found in the Grand Canyon. The rock unit forms a resistant shelf in the west Grand Canyon, south side of the Colorado River, at the east of the Toroweap Fault, down-dropped to west, southeast of Toroweap Overlook (North Rim, at Lava Falls), and west of Havasupai. The red, sandstone shelf, The Esplanade is about 20-mi long. At Toroweap Overlook region, Toroweap Valley with Vulcan's Throne, Uinkaret volcanic field, the resistant Esplanade Sandstone is described in access routes exploring the Toroweap Lake area (Hike 17, Vulcans Throne). The Esplanade Route–(trail), of the east Grand Canyon is also named for the Esplanade Sandstone. The coeval sandstone geologic unit from eastern Utah is the Cedar Mesa Sandstone. Isis Temple and Hermosa Group, Utah In Grand Canyon, Isis Temple landform, north of Grand Canyon Village (South Rim, 5-mi), contains a representative exampl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerial View Of Gunther Castle
Aerial may refer to: Music * ''Aerial'' (album), by Kate Bush, and that album's title track * "Aerials" (song), from the album ''Toxicity'' by System of a Down Bands * Aerial (Canadian band) * Aerial (Scottish band) * Aerial (Swedish band) Recreation and sport *Aerial (dance move) * Aerial (skateboarding) *Front aerial, gymnastics move performed in acro dance * Aerial cartwheel * Aerial silk, a form of acrobatics * Aerial skiing Technology *Aerial (radio), a radio ''antenna'' or transducer that transmits or receives electromagnetic waves **Aerial (television), an over-the-air television reception antenna *Aerial photography Other uses *Aerial, Georgia, a community in the United States * ''Aerial'' (magazine), a poetry magazine * ''Aerials'' (film), a 2016 Emirati science-fiction film *''Aerial'', a TV ident for BBC Two from 1997 to 2001 See also * Arial * Ariel (other) * Airiel * Area (other) * Airborne (other) * Antenna (disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Age (geology)
The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochronology (a scientific branch of geology that aims to determine the age of rocks). It is used primarily by Earth scientists (including geologists, paleontologists, geophysicists, geochemists, and paleoclimatologists) to describe the timing and relationships of events in geologic history. The time scale has been developed through the study of rock layers and the observation of their relationships and identifying features such as lithologies, paleomagnetic properties, and fossils. The definition of standardised international units of geological time is the responsibility of the International Commission on Stratigraphy (ICS), a constituent body of the International Union of Geological Sciences (IUGS), whose primary objective is to precis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
