Synonymer & Information om | Engelska ordet SUBGLACIAL

Exempel på hur man kan använda SUBGLACIAL i en mening

• The existence of a subglacial lake in the Vostok region was first suggested by Russian geographer Andrey Kapitsa based on seismic soundings made during the Soviet Antarctic Expeditions in 1959 and 1964 to measure the thickness of the ice sheet.
• The lowest layer of a glacier, called basal ice, is frequently formed of subglacial meltwater that has refrozen.
• Sedimentary glaciofluvial areas form the core of the Oak Ridges Moraine, though restricted to subglacial cavity fills of confined subaqueous fans.
• Herðubreið is a classic tuya and was quickly recognised as such after the landform was described firstly as a subglacial volcanic construct in 1947.
• Because most of the volcanic system lies underneath Vatnajökull, most of its eruptions have been subglacial and the interaction of magma and meltwater from the ice causes phreatomagmatic explosive activity.
• It originally referred to the well-known subglacial outburst floods from Vatnajökull, Iceland, which are triggered by geothermal heating and occasionally by a volcanic subglacial eruption, but it is now used to describe any large and abrupt release of water from a subglacial or proglacial lake/reservoir.
• In extreme environments such as subglacial lakes, hydrogen generated by mechnochemical reactions involving crushed silicate rocks and water can support methanogenic microbial communities.
• It trends north to south and is dominated by six small shield volcanoes; these shields are topped by small spatter and cinder cones, and the field includes a number of subglacial volcanoes and tuyas.
• Meltwater, as well as groundwater, tends to preferentially flow through subglacial sediment deposits, given that they are sufficiently porous, soft, and deformable.
• Another factor that may have contributed to the lack of glaciation of the Driftless area is the fractured, permeable bedrock within the Paleozoic Plateau underlying it, which would have promoted below-ground drainage of subglacial water that would otherwise have lubricated the underside of the glacial ice sheet.
• Glacial erosion has cut deep cirques into the eastern flank of Mount Rees, and volcanic outcrops indicate that volcanic rocks alternate between subglacial formations and subaerial formations.
• Some examples of perennially ice-covered lakes include Lake Bonney and Lake Hoare in Antarctica's McMurdo Dry Valleys as well as Lake Hodgson, a former subglacial lake.
• Their children included geographer Andrey Kapitsa, (1931–2011), who discovered Lake Vostok, the largest subglacial lake in Antarctica 4,000 meters below the continent's ice cap, and Sergey Kapitsa (1928–2012), physicist and demographer, host of the popular and long-running Russian scientific TV show, Evident, but Incredible.
• During the Llanquihue glaciation Villarrica produced pyroclastic flow deposits, subglacial andesite lavas and dacite dykes.
• The more distinctly flat-topped, steep-sided subglacial volcanoes are called tuyas, named after Tuya Butte in northern British Columbia by Canadian geologist Bill Mathews in 1947.
• Hyaloclastite is a volcanoclastic accumulation or breccia consisting of glass (from the Greek hyalus) fragments (clasts) formed by quench fragmentation of lava flow surfaces during submarine or subglacial extrusion.
• Sideromelane often forms during explosions of submarine volcanoes and subglacial volcanoes, and often occurs as fragments embedded in a palagonite matrix, forming hyaloclastite deposits.
• Geomorphological and paleolimnological evidence indicates that Hodgson Lake had been a subglacial lake covered by an ice sheet at least 470 m (1,542 ft) thick during the Last Glacial Maximum.
• They erode by meltwater, which it has been argued, episodically drains in repeated jökulhlaups from subglacial lakes and reservoirs; examples of such motion have been observed in Antarctica.
• In 2007, an active subglacial water system consisting of several interconnected subglacial lakes was discovered under Whillans Ice Stream using repeat-track data from the ICESat satellite (Fricker and others, 2007).

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