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Hulcross Formation
The Hulcross Formation is a geologic formation in the Western Canada Sedimentary Basin in northeastern British Columbia that was deposited in marine environments during the late Albian stage of the Early Cretaceous period. At one time considered to be a member of the Commotion Formation, it was elevated to formation status by D.F. Stott in 1982.Stott, D.F. 1982. Lower Cretaceous Fort St. John Group and Upper Cretaceous Dunvegan Formation in the foothills and plains of Alberta, British Columbia, District of Mackenzie and Yukon Territory. Geological Survey of Canada, Bulletin 328, 124 p. It preserves ammonites and other fossils.Glass, D.J. (editor) 1997. Lexicon of Canadian Stratigraphy, vol. 4, Western Canada including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba. Canadian Society of Petroleum Geologists, Calgary, 1423 p. on CD-ROM. . Lithology The Hulcross Formation consists of dark grey to black shales and mudstones that were deposited in marine environm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (stratigraphy)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siltstone
Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt. It is a form of mudrock with a low clay mineral content, which can be distinguished from shale by its lack of fissility.Blatt ''et al.'' 1980, pp.381-382 Although its permeability and porosity is relatively low, siltstone is sometimes a tight gas reservoir rock, an unconventional reservoir for natural gas that requires hydraulic fracturing for economic gas production. Siltstone was prized in ancient Egypt for manufacturing statuary and cosmetic palettes. The siltstone quarried at Wadi Hammamat was a hard, fine-grained siltstone that resisted flaking and was almost ideal for such uses. Description There is not complete agreement on the definition of siltstone. One definition is that siltstone is mudrock ( clastic sedimentary rock containing at least 50% clay and silt) in which at least 2/3 of the clay and silt fraction is composed of silt-sized particles. Silt is defi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liard River
The Liard River of the North American boreal forest flows through Yukon, British Columbia and the Northwest Territories, Canada. Rising in the Saint Cyr Range of the Pelly Mountains in southeastern Yukon, it flows southeast through British Columbia, marking the northern end of the Rocky Mountains and then curving northeast back into Yukon and Northwest Territories, draining into the Mackenzie River at Fort Simpson, Northwest Territories. The river drains approximately of boreal forest and muskeg. Geography The river habitats are a subsection of the Lower Mackenzie Freshwater Ecoregion. The area around the river in Yukon is called the ''Liard River Valley'', and the Alaska Highway follows the river for part of its route. This surrounding area is also referred to as the ''Liard Plain'', and is a physiographic section of the larger Yukon–Tanana Uplands province, which in turn is part of the larger Intermontane Plateaus physiographic division. The Liard River is a crossi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scatter Formation
The Fort St. John Group is a stratigraphic unit of Lower Cretaceous age in the Western Canada Sedimentary Basin. It takes the name from the city of Fort St. John, British Columbia and was first defined by George Mercer Dawson in 1881. Lithology The Fort St. John Group is mostly composed of dark shale deposited in a marine environment. Bentonite is present in the shale, and it is interbedded with sandstone, siltstone and conglomerates. Distribution The Fort St. John Group occurs in the subsurface in the Peace River Country of northeastern British Columbia and north-western Alberta, in southern Yukon and southern Northwest Territories. It has a thickness of to . Relationship to other units The Fort St. John Group is conformably overlain by the Dunvegan Formation and conformably underlain by the Bullhead Group or may rest disconformably on older units. Subdivisions The Fort St. John Group is subdivided into the following formations: Canadian Rockies foothills of British Colum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wildhorn Member
The Wildhorn is a mountain of the Alps, straddling the border between the Swiss cantons of Bern and Valais. At above sea level, it is the highest summit of the Bernese Alps west of the Gemmi Pass. It forms a large glaciated massif, about 10 km wide, extending between the Sanetsch Pass and the Rawil Pass. Along with the Muverans, the Diablerets and the Wildstrubel, the Wildhorn is one of the four distinct mountain massifs of the Bernese Alps that lie west of the Gemmi Pass. The massif of the Wildhorn is at the centre between the valleys of the Saane, Simme (both canton of Bern) and the Rhone (Valais). It comprises several distinct summits, including (from west to east) the Arpelistock, Le Sérac, the Geltenhorn, the Sex Noir, the Sex Rouge, the Schnidehorn and the Six des Eaux Froides. The main crest is between the glaciers named ''Tungelgletscher'' and ''Glacier du Wildhorn''. South of the main summit is the almost equally high summit of Mont Pucel (3,177 m). The Wildhorn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peace River Formation
The Peace River Formation is a stratigraphical unit of middle Albian age in the Western Canadian Sedimentary Basin. It takes the name from the Peace River, and was first described on the banks of the river, downstream from the Smoky River confluence to the mouth of the Notikewin River by McConnell in 1893. Lithology The Peace River Formation consists of greywacke, coal, coarse to fine marine sandstone and dark, fissile, non-calcareous shale. Hydrocarbon production Gas is produced from the Cadotte Member in northern-western Alberta. Distribution The Peace River Formation is thick on average. The formation has different extents at different stages, with the Paddy Member present only in the Peace River Country in northern Alberta south of Clear Hills, while the Cadotte Member and the Harmon Member occur in both Alberta and north-eastern British Columbia. Physiography The Peace River Lowland, a landform region in the Alberta Plateau. The landform region is a gently rolling lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halfway River
The Halfway River is a tributary of the Peace River in northeastern British Columbia, Canada. The river originates in the Muskwa Ranges at an elevation of . It flows from Robb Lake, between Mount Kenny and Mount Robb, then flows east to Pink Mountain. It continues south and south-west, paralleling the Alaska Highway, and flows into the Peace River downstream of Hudson's Hope and upstream from Taylor, at an elevation of . The Halfway River First Nation is established on the banks of the river. See also *List of British Columbia rivers The following is a partial list of rivers of British Columbia, organized by watershed. Some large creeks are included either because of size or historical importance (See Alphabetical List of British Columbia rivers ). Also included are lakes th ... References Rivers of British Columbia Peace River Country Peace River Land District {{BritishColumbiaInterior-river-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kakwa River
The Kakwa River is a tributary of the Smoky River in western Alberta, Canada. The river is named for ''Kakwa'', the Cree word for porcupine. Porcupines are abundant in Kakwa Provincial Park and Protected Area. Tourism along the river revolves around bull trout fishing and white water rafting. Kakwa Falls () are developed in the course of the river, over a high ledge formed by an outcrop of the Cadomin Formation. The area was designated a protected wildland ( Kakwa Wildland Park). It can be accessed through the forestry road network south of Highway 666, approximately south of Two Lakes Provincial Park. Course The Kakwa River originates in Kakwa Lake, north of McBride, in British Columbia, at an elevation of . The surrounding area is protected by Kakwa Provincial Park and Protected Area. The river flows north-east into the province of Alberta in Kakwa Wildlands Park, then flows east and north-east through the foothills. It is crossed by the Bighorn Highway before it converge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peace River
The Peace River (french: links=no, rivière de la Paix) is a river in Canada that originates in the Rocky Mountains of northern British Columbia and flows to the northeast through northern Alberta. The Peace River joins the Athabasca River in the Peace-Athabasca Delta to form the Slave River, a tributary of the Mackenzie River. The Finlay River, the main headwater of the Peace River, is regarded as the ultimate source of the Mackenzie River. The combined Finlay–Peace–Slave–Mackenzie river system is the 13th longest river system in the world. History The regions along the river are the traditional home of the Danezaa people, called the Beaver by the Europeans. The fur trader Peter Pond is believed to have visited the river in 1785. In 1788 Charles Boyer of the North West Company established a fur trading post at the river's junction with the Boyer River. In 1792 and 1793, the explorer Alexander Mackenzie travelled up the river to the Continental Divide. Mac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Rockies
The Canadian Rockies (french: Rocheuses canadiennes) or Canadian Rocky Mountains, comprising both the Alberta Rockies and the British Columbian Rockies, is the Canadian segment of the North American Rocky Mountains. It is the easternmost part of the Canadian Cordillera, which is the northern segment of the North American Cordillera, the expansive system of interconnected mountain ranges between the Interior Plains and the Pacific Coast that runs northwest–southeast from central Alaska to the Isthmus of Tehuantepec in Mexico. Canada officially defines the Rocky Mountains system as the mountain chains east of the Rocky Mountain Trench extending from the Liard River valley in northern British Columbia to the Albuquerque Basin in New Mexico, not including the Mackenzie, Richardson and British Mountains/ Brooks Range in Yukon and Alaska (which are all included as the "Arctic Rockies" in the United States' definition of the Rocky Mountains system). The Canadian Rockies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concretions
A concretion is a hard, compact mass of matter formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil. Concretions are often ovoid or spherical in shape, although irregular shapes also occur. The word 'concretion' is derived from the Latin "(act of) compacting, condensing, congealing, uniting", itself from ''con'' meaning 'together' and ''crescere'' meaning "to grow". Concretions form within layers of sedimentary Stratum, strata that have already been deposited. They usually form early in the burial history of the sediment, before the rest of the sediment is hardened into rock. This concretionary cement often makes the concretion harder and more resistant to weathering than the host stratum. There is an important distinction to draw between concretions and Nodule (geology), nodules. Concretions are formed from mineral precipitation around some kind of nucleus while a nodule is a replacement body. Descriptio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
