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Castle Reef
Castle Reef is an mountain summit located in Teton County of the U.S. state of Montana. Description Castle Reef is located in the Rocky Mountain Front, which is a subset of the Rocky Mountains. It is situated 26 miles west-southwest of Choteau, in Lewis and Clark National Forest. Precipitation runoff from the mountain drains into tributaries of the Sun River. Topographic relief is significant as the east aspect rises nearly above the prairie. Neighbors include Sawtooth Ridge seven miles to the south, and Ear Mountain 11 miles to the north. Geology Castle Reef is composed of sedimentary rock laid down during the Precambrian to Jurassic periods. Formed in shallow seas, this sedimentary rock was pushed east and over the top of younger rock during the Laramide orogeny. The Lewis Overthrust extends over from Mount Kidd in Alberta, south to Steamboat Mountain which is located 25 miles south of Castle Reef, which places Castle Reef within the southern extent of the Lewis Over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teton County, Montana
Teton County is a county in the U.S. state of Montana. As of the 2020 census, the population was 6,226. Its county seat is Choteau. The county was founded in 1893. Geography According to the United States Census Bureau, the county has a total area of , of which is land and (0.9%) is water. Adjacent counties * Pondera County – north * Chouteau County – east * Cascade County – southeast * Lewis and Clark County – south * Flathead County – west National protected area *Lewis and Clark National Forest (part) * Rocky Mountain Front Conservation Area (part) Demographics 2000 census As of the 2000 United States census, there were 6,445 people, 2,538 households, and 1,761 families in the county. The population density was 3 people per square mile (1/km2). There were 2,910 housing units at an average density of 1 per square mile (0.5/km2). The racial makeup of the county was 96.31% White, 0.19% Black or African American, 1.52% Native American, 0.09% Asian, 0.42% ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ear Mountain (Montana)
Ear Mountain is an mountain summit located in Teton County of the U.S. state of Montana. Description Ear Mountain is located in the Rocky Mountain Front, which is a subset of the Rocky Mountains. It is situated 23 miles west of Choteau, along the common border shared by Bureau of Land Management and Lewis and Clark National Forest. The Ear Mountain Wildlife Management Area is located nearby, to the east of the mountain. Precipitation runoff from the mountain drains into tributaries of the Teton River. Topographic relief is significant as the southwest aspect rises above South Fork Willow Creek in 0.7 mile, and the east aspect rises above the plains. Climate Based on the Köppen climate classification, Ear Mountain is located in a subarctic climate zone characterized by long, usually very cold winters, and mild to warm summers. Winter temperatures can drop below −10 °F with wind chill factors below −30 °F. See also * Geology of the Rocky Mountains The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountains Of Montana
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of The Rocky Mountains
The geology of the Rocky Mountains is that of a discontinuous series of mountain ranges with distinct geological origins. Collectively these make up the Rocky Mountains, a mountain system that stretches from Northern British Columbia through central New Mexico and which is part of the great mountain system known as the North American Cordillera. The rocky cores of the mountain ranges are, in most places, formed of pieces of continental crust that are over one billion years old. In the south, an older mountain range was formed 300 million years ago, then eroded away. The rocks of that older range were reformed into the Rocky Mountains. The Rocky Mountains took shape during an intense period of plate tectonic activity that resulted in much of the rugged landscape of the western North America. The Laramide orogeny, about 80–55 million years ago, was the last of the three episodes and was responsible for raising the Rocky Mountains. Subsequent erosion by glaciers has created the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subarctic Climate
The subarctic climate (also called subpolar climate, or boreal climate) is a climate with long, cold (often very cold) winters, and short, warm to cool summers. It is found on large landmasses, often away from the moderating effects of an ocean, generally at latitudes from 50° to 70°N, poleward of the humid continental climates. Subarctic or boreal climates are the source regions for the cold air that affects temperate latitudes to the south in winter. These climates represent Köppen climate classification ''Dfc'', ''Dwc'', ''Dsc'', ''Dfd'', ''Dwd'' and ''Dsd''. Description This type of climate offers some of the most extreme seasonal temperature variations found on the planet: in winter, temperatures can drop to below and in summer, the temperature may exceed . However, the summers are short; no more than three months of the year (but at least one month) must have a 24-hour average temperature of at least to fall into this category of climate, and the coldest month should ave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köppen Climate Classification
The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notably in 1918 and 1936. Later, the climatologist Rudolf Geiger (1894–1981) introduced some changes to the classification system, which is thus sometimes called the Köppen–Geiger climate classification system. The Köppen climate classification divides climates into five main climate groups, with each group being divided based on seasonal precipitation and temperature patterns. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' indi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Locality (geology)
Type locality, also called type area, is the locality where a particular rock type, stratigraphic unit or mineral species is first identified. If the stratigraphic unit in a locality is layered, it is called a stratotype, whereas the standard of reference for unlayered rocks is the type locality. The term is similar to the term type site in archaeology or the term type specimen in biology. Examples of geological type localities Rocks and minerals * Aragonite: Molina de Aragón, Guadalajara, Spain * Autunite: Autun, France * Benmoreite: Ben More (Mull), Scotland * Blairmorite: Blairmore, Alberta, Canada * Boninite: Bonin Islands, Japan * Comendite: Comende, San Pietro Island, Sardinia * Cummingtonite: Cummington, Massachusetts * Dunite: Dun Mountain, New Zealand. * Essexite: Essex County, Massachusetts, US * Fayalite: Horta, Fayal Island, Azores, Portugal * Harzburgite: Bad Harzburg, Germany * Icelandite: Thingmuli (Þingmúli), Iceland * Ijolite: Iivaara, Kuusamo, Finl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Castle Reef Dolomite
The Castle Reef Dolomite is a geologic formation in Montana. It preserves fossils dating back to the Carboniferous period. Castle Reef is the type locality. See also * List of fossiliferous stratigraphic units in Montana This article contains a list of fossil-bearing stratigraphic units in the state of Montana, U.S. Sites See also * Paleontology in Montana References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Montana Montana Stratigraphic u ... * Paleontology in Montana References * Carboniferous Montana {{Carboniferous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Kidd
Mount Kidd is a double-summit massif centrally located in Kananaskis Country in the Canadian Rockies of Alberta, Canada. Mount Kidd is situated within Spray Valley Provincial Park, and its nearest higher neighbor is Mount Sparrowhawk, to the northwest. Mount Kidd is a landmark that can be seen from Alberta Highway 40, Highway 40 in the Kananaskis Village area, and from the Kananaskis Country Golf Course which lies at the eastern base of the mountain. History In 1907, Dr. Donaldson Mount Bogart, Bogart Dowling, an engineer with the Geological Survey of Canada, named the mountain for John Alfred (Fred) Kidd, who was a resident of nearby Morley, Alberta, Morley, Alberta. From 1902 to 1907, Kidd ran the Morley general store and outfitted expeditions and geological survey crews such as Dowling's with supplies. The first ascent of the mountain was made in 1947 by R. C. Hind and J. F. Tarrant. The mountain's name was officially adopted in 1953 by the Geographical Names Board ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lewis Overthrust
The Lewis Overthrust is a geologic thrust fault structure of the Rocky Mountains found within the bordering national parks of Glacier in Montana, United States and Waterton Lakes in Alberta, Canada. The structure was created due to the collision of tectonic plates about 170 million years ago that drove a several mile thick wedge of rock eastwards, causing it to overlie softer Cretaceous age rock that is 400 to 500 million years younger. Geography The Canadian Rocky Mountain foreland thrust and fold belt is a northeastward tapering deformational belt consisting of Mesoproterozoic, Paleozoic, and Mesozoic strata. The Lewis thrust sheet is one of the major structures of the foreland thrust and fold belt extending over from Mount Kidd near Calgary, AB in the Southeast Canadian Cordillera to Steamboat Mountain, located west of Great Falls, Northwest Montana in the United States. The Lewis overthrust provides scientific insight into geologic processes happening in other parts of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laramide Orogeny
The Laramide orogeny was a time period of mountain building in western North America, which started in the Late Cretaceous, 70 to 80 million years ago, and ended 35 to 55 million years ago. The exact duration and ages of beginning and end of the orogeny are in dispute. The Laramide orogeny occurred in a series of pulses, with quiescent phases intervening. The major feature that was created by this orogeny was deep-seated, thick-skinned deformation, with evidence of this orogeny found from Canada to northern Mexico, with the easternmost extent of the mountain-building represented by the Black Hills of South Dakota. The phenomenon is named for the Laramie Mountains of eastern Wyoming. The Laramide orogeny is sometimes confused with the Sevier orogeny, which partially overlapped in time and space. The orogeny is commonly attributed to events off the west coast of North America, where the Kula Plate, Kula and Farallon Plates were sliding under the North American plate. Most hypothes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jurassic
The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of the Mesozoic, Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic magmatic province, Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread Anoxic event, oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar, Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
