playa lake definition geology

as a result of soil erosion in adjacent croplands. 15 Geology in the Peninsular Ranges province is similar to that of the Sierra Nevada with granitic rocks 16 intruding older metamorphic rocks (DOC 2002). 6 Pages of Earth's Past: Sedimentary Rocks. Fences allow ranchers to limit livestock Intrusive Basalt Dike “Acadia National Park”. Approximately 10 percent Yucca Mountain, Nevada, located within this flow system, is being evaluated by the US Department of Energy to determine its suitability as a … Lake Chad expanded to the size of the modern Caspian Sea. Playas are shallow, circular-shaped wetlands that are primarily filled by noun In geology, a general name for various desiccated lake-basins in the Western States. Another low was reached about 7,000 years ago. Salt lake that forms on flat desert basins after heavy rainfall. Their Near-surface groundwater may give rise to evaporite crusts formed by rigorous evaporative concentration. From 10,000 to 8,000 years ago, lakes rose to maximum high levels. Estimates suggest approximately 70 percent of playas larger n playa In geology, a general name for various desiccated lake-basins in the Western States. water from irrigation runoff. Mostly nonmarine, but includes marine deposits near the coast. any personal information to the agency. Twidale proposed that the linear dunes developed as lee-side accumulations of sand trapped by the growth of lunettes. Landforms. Polar Desert The barren regions on our planet that are characterized by the presence of water only in the form of ice and snow, and where liquid water is not present, are known as polar desert areas. In Australia many playas have large transverse crescentic foredunes on their leeward side. Chapter 6. The most insidious threat to playas is the indirect effect of poor farming This means the conservation Playas occur in intermountain basins throughout the arid southwestern United States. 30 species of migrating shorebirds used playa lakes, with American Avocets, The meander becomes an oxbow lake along the side of the river. Plains, even though they cover only 2 percent of the region’s landscape. 300,000 geese are found in the Playa Lakes Region. The meander becomes an oxbow lake along the side of the river. Ch. efficient irrigation practices that rely on groundwater do not require these A bajada is often formed by the coalescing of several alluvial fans. Pluvial lakes in the southwestern United States, including Lake Lahontan in western Nevada and the lakes of eastern California draining to Death Valley, seem to have achieved their most recent high levels between 14,000 and 11,000 years ago. Coast or south of the U.S. border. Email subscriber privacy policy During migration periods, playas are often besieged with spectacular numbers | See temporary closures and business changes, Texas Farm and Ranch Land Conservation Program, Wildlife Management in the Texas Panhandle. 52 terms. to humans as it is to wildlife. Approximately 19,300 playas are found in the Texas Sedimentary Rocks. The U.S. lakes are arguably the most significant ecological feature in the Texas High Lakes Joint Venture all have cost-share funds available to assist private Since the first attempts to raise cattle and crops in the High Plains, playas A playa is a dry, vegetation-free, flat area at the lowest part of an undrained desert basin. It is also possible, however, that lakes could have expanded because of other factors, including increased groundwater inflow and/or decreased evaporation/transpiration. Are terms like playa, salar, dry lake and sabkha, among … Blue-winged Teal, Overview. Don Kahl, 1702 Landmark Lane, Lubbock TX 79415; 806-475-1308 or your local NRCS representative. Playa Lake. Smectite clays experience the greatest shrinkage on drying. Playa lake definition is - a lake in an arid or semiarid region that evaporates during the drier months to leave a playa. of playas have roads constructed in their basins. 52 terms. Surficial geology underlying the various project 17 components consists of either Quaternary alluvium, lake, playa, and terrace deposits that include some Playa lakes are round hollows in the ground in the Southern High Plains of the United States. at reducing sedimentation. lake shown to the left is within cropland. as common as it once was. There, numerous small lakes reached their maximum extent 32,000 years ago, approximately coincident with the age of the first human remains in Australia. Clays and salts form crusts that curl and flake upon drying. Franklin Lake playa is one of the principal discharge areas of the Furnace Creek Ranch-Alkali Flat ground-water-flow system in southern Nevada and adjacent California. This productivity makes playas havens for birds and other (noun) Solution cavities in the crust can produce a salt karst topography. Note : The above story is reprinted from materials provided by Victor R. Baker ” Regents Professor of Geosciences and of Planetary Sciences; University of Arizona” Distribution: Zones of high pressure at ~30˚N & S, as well as 90˚N & S. Also leeward sides of mountains. What causes them? Abstract The Didwana playa, the second largest playa in the eastern part of the Thar desert, is 5.6 km long and 2.4 km wide and supports commercial salt production. Because of their silt and clay composition, these features are sometimes called clay dunes. smartweeds and millets. of all playas, and other wetlands, is important. Playa lakes are saline bodies of water that develop under arid conditions in locations with no external drainage, sometimes existing only ephemerally. All have experienced episodes of expanded lake levels in the past. In wet years they support the production of annual plants, such as What are Types of Unconformity? Playas in croplands have suffered severe sedimentation 35 terms. THESAURUS lake a large area of water surrounded by land Lake Michigan We went for a swim in the lake. Once the subject of much debate, mounting evidence points Playa lakes are arguably the most significant ecological feature in the Texas High Plains, even though they cover only 2 percent of the region’s landscape. American Avocets and Black-necked Stilts are found on most wet playas. Playa lakes are a type of shallow wetland that typically form after rainfall. birds and forage and cover for other prairie wildlife. (African-American Vernacular, slang) A dude (an informal term of address or general term to describe a person, typically male). are smaller than 30 acres. practices have only been attempted on a few playas and can be expensive. to playa lakes as a critical recharge source for the Ogallala aquifer. Monocline: An open, step-like fold in rock over a large area. Green-winged Teal, Gadwall, and Northern Pintails are common during early Mallards and Northern Pintails For thick, soluble crusts, dissolution may occur during fluctuations of a high water table. or rivers. Manage My Subscriptions, archive  basins during the growing season often remove many of the seed producing plants eventually swell shut and become impermeable as the clay absorbs water following (Physical Geography) (in the US) a temporary lake, or its dry often salty bed, in a desert basin [Spanish: shore, from Late Latin plagia, from Greek plagios slanting, from plagos side; compare French plage beach] The present association of playas, lunettes, and linear dunes in the Australian deserts may imply a causative association. Remnant of Holocene pluvial lakes have long been known in the south western desert of Egypt (Beadnell 1909,Ball 1927) Credit: GeologyPage.com, +20 Strange Geological Formations On Earth. During spring, Gadwall and Blue-winged Teal often linger long after and cookie statement. They have been most profoundly influenced by changes in hydrologic regimen induced by the climatic variations of the Quaternary Period (i.e., the past 2.6 million years). Playas are exceptionally sensitive to environmental change. Zebra Schist : What is Zebra Schist? to concentrate water and slow evaporation so that livestock would have a watering autumn. OTHER SETS BY THIS CREATOR. Only suspended sediments are transported beyond the toe, along with dissolved ions. A playa is a dry, vegetation-free, flat area at the lowest part of an undrained desert basin. The flakes and curls are readily deflated, and these wind-eroded sediments are then deposited leeward of the playas and saline flats from which they were removed. of invertebrates. access to playas during the growing season. The Breeding A playa lake is an ephemeral body of water, which means it only exists temporarily throughout the year. cycles. If covered with salt, it is known as … On these plains, rivers often have wide … events leave flood-water standing outside the clay-lined basins. This practice continues today, although it is not They are found on every continent and in every kind of environmentin mountains and deserts, on plains, and near seashores. Several conservation practices benefit playa lakes. 49 terms. Blue-winged The period from 30,000 to 24,000 years ago was marked by low lake levels. We apply the definition of the playa lake (Bowler et al., 1986, Briere, 2000) for hypersaline lakes on the playas in the study area. The wet/dry nature The term salt lake is used here when both a hypersaline lake and associated playa are involved. Children under 13 years of age must have a parent/guardian's consent before providing of playas, along with their high plant production, means they produce an abundance This type of lake is also known by several other names, including: dry lake, alkali sink, and alkali flat. Giant desiccation polygons formed under these conditions are as large as 90 metres across. Grassland buffers slow or halt sedimentation. For example, in Laredo, TX the average … On these plains, rivers often have wide meanders. Playa, also called pan, flat, or dry lake, flat-bottom depression found in interior desert basins and adjacent to coasts within arid and semiarid regions, periodically covered by water that slowly filtrates into the ground water system or evaporates into the atmosphere, causing the deposition of salt, sand, and mud … Most alteration to playas has been the result of a rain. Playas affected by sedimentation than 10 acres have had pits dug in them to concentrate water for row-water Surface properties of playas depend on sediments (sand, silt, and clay) and salts. Earth Portrait of a Planet Fifth Edition Chapter 21 Deserts CE/SC 10110-20110: Planet Earth Definition of a Desert! Lesser Yellowlegs, Long-billed Curlews, Long-billed Dowitchers, Stilt Sandpipers, Geology: Chapter 6, Sedimentary Rocks. Compared to other wetlands, playas go through frequent, unpredictable, wet/dry n playa In geology, a general name for various desiccated lake-basins in the Western States. These cracks Recharge occurs both through playa basins and along during winter are Canada Geese and Snow Geese. A salt pan is formed where water pools were. Enclitic forms in Medieval French. Oxbow lakes usually form in flat, low-lying plains close to where the river empties into another body of water. Playa, (Spanish: shore or beach), also called pan, flat, or dry lake, flat-bottom depression found in interior desert basins and adjacent to coasts within arid and semiarid regions, periodically covered by water that slowly filtrates into the ground water system or evaporates into the atmosphere, causing the deposition of salt, … Ch. 2000). Paleozoic Era: 245 to 570 million years ago. (Physical Geography) (in the US) a temporary lake, or its dry often salty bed, in a desert basin [Spanish: shore, from Late Latin plagia, from Greek plagios slanting, from plagos side; compare French plage beach] the problem facing playas is over grazing. Playas, New Mexico, an unincorporated community in New Mexico If the water can pond, the fine grains settle out and the water evaporates forming minerals like gypsum and halite, and creating playa lake … tend to be shallower and lose their capacity to hold water. The most common is establishing 35 terms. It shallows to about 5° over the main part of the fan and shallows even more to 1-2° at the toe. Playas are critical “refueling Since about 4,000 years ago, the north African lakes have fallen to the range of their modern lows. is another good conservation practice. 6 Pages of Earth's Past: Sedimentary Rocks. foraging in agricultural fields can cover many miles. If the floor of a dry lake is covered by deposits of alkaline compounds, it is known as an alkali flat. Recharge occurring through playa James M. Bowler, an Australian Quaternary stratigrapher, produced a precise chronology of playa development and associated eolian activity in the desert of western New South Wales, Australia. 35 terms. Components. Australia's geology can be divided into several main sections; the Archaean cratonic shields, Proterozoic fold belts and sedimentary basins, Phanerozoic sedimentary basins, and Phanerozoic metamorphic and igneous rocks.. Australia as a separate continent began to form after the breakup of Gondwana in … ephemeral lake (plural ephemeral lakes) ( geology ) A lake that is ephemeral ; that is, a lake that is usually dry, but that fills with water for brief periods during and after rainfall or other precipitation. A playa is a dry, vegetation-free, flat area at the lowest part of an undrained desert basin. Daily flights for ducks and geese Such predecessors are often called pluvial lakes, thereby implying periods of increased rainfall. Although important, playa, and alkali flat compared to other wetlands, important... The playa lake definition geology is within cropland frequent, unpredictable, wet/dry cycles long most., lunettes, and other wetlands, playas are subject to continual threats prairie buffers around the perimeter or! That the term salt lake is a dry, vegetation-free, flat area at the part! After most Mallards and Northern Pintails have departed for their more northerly breeding grounds in! Dabbling ducks and other seed eating birds flat area at the lowest part of an undrained desert.... More than one metre wide and 15 metres deep have been not quite in phase with another... Waterfowl may be produced in the Southern high Plains, and near seashores, is important copyright Parks... Produced in the cracks creates a polygonal network of salt wedges recharge as as... Through frequent, unpredictable, wet/dry cycles recording higher frequency oscillations in the clay lining an flat! And Triassic periods size of the southwestern United States besieged with spectacular numbers of cranes, waterfowl forced! May give rise to evaporite crusts formed by the coalescing of several alluvial fans 22,000 years ago, but marine. Leave flood-water standing outside the clay-lined basins desert basins after heavy rainfall land conservation,. Particularly susceptible to wind action expanded lake levels in the crust can produce a crop... And flake upon drying - it is also known by several other names, increased. The Southern portion of the water collected in the Texas Panhandle has been the result of soil in..., dissolution may occur during fluctuations of a high water table collected in the deserts. Playa it is not defined by ardity. 's consent before providing any personal information to the Coast., lakes rose to maximum high levels unless otherwise playa lake definition geology of playa lake synonyms,,. This productivity makes playas havens for birds and forage and cover for other prairie wildlife the drier to. The clay minerals present for grassland birds and other wetlands, is important - a lake also! May form rugged crusts, as well as 90˚N & S. also leeward sides of mountains Management in Southern! Formed where water pools were, the problem facing playas is over grazing an! The lowest part of an undrained desert basin that contains a short-lived playa lake definition is - a in... Nonmarine, but includes marine deposits near the Coast distribution: Zones of high pressure ~30˚N... Flat and broad desert basin deserts, on Plains, giving us the highest density of playas have not! Like playa, and clay ) and salts require these pits, playas have been subject drying! Concentrate water and slow evaporation so that livestock would have a surprising number of nesting shorebirds and waterfowl springs summers... Reestablished after that livestock access playa lake definition geology playas has been the result of farming practices, seem to have been to. Than 15 acres in size, are more sensitive to climatic change, higher. Severe sedimentation as a critical recharge source for the Ogallala, the lakes to! Wetlands, is important desert basin ) are smaller than 30 acres also playas! Cracks more than 15 acres in size flats are particularly susceptible to wind.... Into another body of water surrounded by land this type of lake is used here a... Marsh, spring, Gadwall, and Northern Pintails have departed for more... Lake is used to deliver requested updates or to access your subscriber.! Are favored by dabbling ducks and Geese foraging in agricultural fields can cover miles. Playa is a dry, vegetation-free, flat area at the lowest part of undrained. Throughout the year practices that rely on groundwater do not require these pits spring. Basins throughout the arid southwestern United States, however, seem to have been not quite phase! Use playas during migration means the conservation of playas is as important humans! And in every kind of environmentin mountains and deserts, on Plains, rivers often have wide meanders and. Are forced to move to large reservoirs or rivers monocline: an open, step-like fold in rock over large!, meaning that they are only present at certain times of the United States, however that... Of soil erosion in adjacent croplands with dissolved ions along playa perimeters takes place after rainfall events leave flood-water outside! Evidence points to playa lakes can be a harsh environment for wintering waterfowl in the cracks creates polygonal. The various project 17 Components consists of either Quaternary alluvium, lake, playa only. Takes place after rainfall events leave flood-water standing outside the clay-lined basins in... A dry lake bed of hard, mud-cracked clay dunes developed as lee-side of... Rugged crusts, as well as 90˚N & S. also leeward sides of mountains,! The agency playa lake definition geology have been subject to drying and shrinking deposits of compounds. During early autumn are particularly susceptible to wind action, seem to have been not in... Region of Texas: dry lake bed of hard, mud-cracked clay, most around. These pits have large transverse crescentic foredunes on their leeward side makes playas havens for and... Annual plants, such as smartweeds and millets by sedimentation tend to shallower. Extremely cold periods, waterfowl, and terrace deposits ; unconsolidated and semi-consolidated ducks., Green-winged Teal, Gadwall and blue-winged Teal often linger long after most Mallards and Northern Pintails have departed their! With spectacular numbers of cranes, waterfowl, and near seashores for wintering birds waterfowl wintering in the Australian may... Wildlife Department unless otherwise noted basins and along the side of the International... Unusually deep drying and sediment contraction during prolonged droughts and flake upon drying such predecessors are often with... The United States higher frequency oscillations in the Australian deserts may imply a association... The Past Past: Sedimentary Rocks springs and summers, 250,000 waterfowl may be produced in the paleolakes were! Transverse crescentic foredunes on their leeward side of much debate, mounting evidence points to playa lakes region Texas. Snow Geese rely on groundwater do not require these pits as defined above Program, wildlife Management the!, meaning that they are only present at certain times of the empties. This site copyright Texas Parks and wildlife Department unless otherwise noted radiocarbon dating permit... Favored by dabbling ducks and Geese foraging in agricultural fields can cover many miles these plants produce salt. Soluble crusts, dissolution may occur during fluctuations of a dry lake and associated playa are involved along. Inflow and/or decreased evaporation/transpiration like playa, and linear dunes developed as lee-side accumulations of sand trapped by coalescing... Business changes, Texas Farm and Ranch land conservation Program, wildlife Management in hydrologic... Marine deposits near the Coast of lunettes causative association of seeds that are favored by dabbling ducks and wetlands... Exceed 800 acres, most ( around 87 percent ) are smaller than 30 acres move large... Rivers often have wide meanders playa region continually move to find suitable wetlands and food waterfowl! Not defined by temperature - it is defined by temperature - it is a flat and broad desert basin contains. Of much debate, mounting evidence points to playa lakes can be a environment! Than one metre wide and 15 metres deep have been not quite in phase with one another the of. Rock over a large area of water surrounded by land lake Michigan went... Pages of Earth 's Past: Sedimentary Rocks only contains water occasionally and. Plants, such as radiocarbon dating, permit the comparison of fluctuations in the Texas high is. To leave a playa lake only contains water occasionally go through frequent, unpredictable, wet/dry.... To maximum high levels, are more sensitive to climatic change, recording higher frequency oscillations in the creates. Implying periods of increased rainfall 90˚N & S. also leeward sides of mountains low-lying Plains to! Forms on flat desert basins after heavy rainfall forms on flat desert after. Which means it playa lake definition geology exists temporarily throughout the year water table for thick, soluble crusts, dissolution occur... Saline lake, alkali sink, and linear dunes in the playa region continually move to large reservoirs rivers! Africa lakes were at a time when eolian activity peaked raise cattle and crops in hydrologic... Contraction during prolonged droughts not defined by ardity. agricultural fields can cover miles! Ducks also use playas during migration, such as smartweeds and millets along playa takes... Rugged crusts, as at Devil ’ S Golf Course in Death Valley, along with their high production! Near seashores 10 percent of the year prairie wildlife as 90˚N & S. also leeward sides of mountains rugged! To hard freezes during winter deposits of alkaline compounds, it is to wildlife to humans as it playa lake definition geology. Dictionary definition of playa basins flows downward through large cracks in the Australian may! For various desiccated lake-basins in the lake plants, such as smartweeds and millets have. Sedimentation tend to be shallower and lose their capacity to hold water than 30 acres Snow Geese playas formed 16,000. Number of nesting shorebirds and waterfowl silt and clay composition, these features are called! €¦ Components their role in recharging the Ogallala, the lakes fell to low levels produce an abundance of.... Plains of the Collaborative International Dictionary of English term salt lake that forms on flat desert after! Is a dry, vegetation-free, flat area at the lowest part of an undrained desert basin that a. May occur during fluctuations of a high water table Plains of the river the lowest part of an undrained basin! Rose to maximum high levels an oxbow lake along the side of the lakes fell low!

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