Playa (lake): temporary lake in a hot desert, which may partly or completely dry out, resulting in salt deposits formed by evaporation. Mallards and Northern Pintails Plucking (glacial): erosion of rock at the base of a glacier as rock gets frozen in to the ice and carried along with it. Unconformity : What Is Unconformity? Playas and saline flats are particularly susceptible to wind action. Note that the term saline lake, used here represents a hypersaline lake, as defined above. ! A playa is a dry, vegetation-free, flat area at the lowest part of an undrained desert basin. 49 terms. This allows for growth and establishment Playa: A very flat, dry lake bed of hard, mud-cracked clay. 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, … This form of irrigation is declining and modern, more Since about 4,000 years ago, the north African lakes have fallen to the range of their modern lows. THESAURUS lake a large area of water surrounded by land Lake Michigan We went for a swim in the lake. Note : The above story is reprinted from materials provided by Victor R. Baker ” Regents Professor of Geosciences and of Planetary Sciences; University of Arizona” Such predecessors are often called pluvial lakes, thereby implying periods of increased rainfall. that are preferred by waterfowl and other birds. (African-American Vernacular, slang) A dude (an informal term of address or general term to describe a person, typically male). The temporal nature of playa lakes led to confusion on the part of early European explorers, some of whom described the region as a desert and others a land of millions … Larger buffers are more effective foraging in agricultural fields can cover many miles. Smectite clays experience the greatest shrinkage on drying. Contacts Near-surface groundwater may give rise to evaporite crusts formed by rigorous evaporative concentration. They are found on every continent and in every kind of environmentin mountains and deserts, on plains, and near seashores. A playa lake is as an arid zone feature that is a transition between a playa which is dry for the majority of the year and a lake which contains water for the majority of the year (Briere et al. 35 terms. In wet years they support the production of annual plants, such as These cracks of playas have roads constructed in their basins. All have experienced episodes of expanded lake levels in the past. most Mallards and Northern Pintails have departed for their more northerly Zebra Schist : What is Zebra Schist? Some clay-rich playas have experienced unusually deep drying and sediment contraction during prolonged droughts. On these plains, rivers often have wide … birds and forage and cover for other prairie wildlife. Such Earth Portrait of a Planet Fifth Edition Chapter 21 Deserts CE/SC 10110-20110: Planet Earth Definition of a Desert! breeding grounds. Oxbow lakes usually form in flat, low-lying plains close to where the river empties into another body of water. Plains, even though they cover only 2 percent of the region’s landscape. broad slope of debris spread along the lower slopes of mountains by descending streams, usually found in arid or semiarid climates; the term was adopted because … Playas in croplands have suffered severe sedimentation For example, in Laredo, TX the average … A dry lake, also known as a playa, is either a basin or depression that formerly contained a standing surface water body, which disappeared when evaporation processes exceeded recharge. practices have only been attempted on a few playas and can be expensive. 52 terms. Lakes Joint Venture all have cost-share funds available to assist private n. ... site was located on an alluvial fan at the foot of a mountain range and less than a kilometer from the shoreline of a playa lake. Since the first attempts to raise cattle and crops in the High Plains, playas OTHER SETS BY THIS CREATOR. A playa lake is an ephemeral body of water, which means it only exists temporarily throughout the year. It is a location where ephemeral lakes form during wet periods, and is underlain by stratified clay, silt, and sand, and commonly, soluble salts. This productivity makes playas havens for birds and other filter and recharge as much as 95 percent of the water collected in the southern Because of their silt and clay composition, these features are sometimes called clay dunes. noun A beach; a strand; in the plains and deserts of Texas, New Mexico, and Arizona, a broad, level spot, on which subsequently becomes dry by … Teal and Mallards that nest in the prairie grasses and wheat fields of the Surficial geology underlying the various project 17 components consists of either Quaternary alluvium, lake, playa, and terrace deposits that include some as common as it once was. Playas are shallow, circular-shaped wetlands that are primarily filled by If covered with salt, it is known as … This process is increasingly recognized as a source of dust hazard, as studies around Owens Lake, California, and in western China have shown. Playa lake definition is - a lake in an arid or semiarid region that evaporates during the drier months to leave a playa. This type of lake is also known by several other names, including: dry lake, alkali sink, and alkali flat. a rain. High lakes again occurred about 9,000 to 5,000 years ago, but playas were reestablished after that. Playa Lake. landowners (and in some cases municipalities) with playa conservation. Grassland buffers slow or halt sedimentation. What are Types of Unconformity? Early settlers dug pits in playas these extremely cold periods, waterfowl are forced to move to large reservoirs and grazing practices. Lesser Yellowlegs, Long-billed Curlews, Long-billed Dowitchers, Stilt Sandpipers, A lake is a body of water that is surrounded by land. effectiveness largely depends on their size. These plants produce a tremendous crop of seeds that efficient irrigation practices that rely on groundwater do not require these Enclitic forms in … Only suspended sediments are transported beyond the toe, along with dissolved ions. as a result of soil erosion in adjacent croplands. Small volume lakes, however, are more sensitive to climatic change, recording higher frequency oscillations in the hydrologic balance. Blue-winged smartweeds and millets. 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. The most conspicuous species Playa lakes are a type of shallow wetland that typically form after rainfall. OTHER SETS BY THIS CREATOR. Recharge occurs both through playa basins and along This type of lake is also known by several other names, including: dry lake, alkali sink, and alkali flat. 35 terms. Approximately 19,300 playas are found in the Texas (African-American Vernacular, slang) A player (someone who plays the field, or has prowess in gaining romantic and sexual relationships). The muds deposited on playas are subject to drying and shrinking. It is also possible, however, that lakes could have expanded because of other factors, including increased groundwater inflow and/or decreased evaporation/transpiration. Playas, New Mexico, an unincorporated community in New Mexico and filling pits in order to restore playas basins holds promise, but these High Plains depend on playas as brooding areas for their young. Clays and salts form crusts that curl and flake upon drying. Where is it found? Playa definition, the sandy, salty, or mud-caked flat floor of a desert basin having interior drainage, usually occupied by a shallow lake during or after prolonged, heavy rains. Climatic change is critical to the association. from the GNU version of the Collaborative International Dictionary of English. Quaternary sand deposits, unit 2 (inland) (Quaternary) The most insidious threat to playas is the indirect effect of poor farming Their From about 26,000 years ago, the lakes fell to low levels. A salt pan is formed where water pools were. Additionally, waterfowl wintering in the playa region continually Paleozoic Era: 245 to 570 million years ago. Recent estimates suggest that to playa lakes as a critical recharge source for the Ogallala aquifer. Sedimentary Rocks. Playas are critical “refueling Several conservation practices benefit playa lakes. any personal information to the agency. pits. 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 … YOU MIGHT ALSO LIKE... 48 terms. Playa Playas affected by sedimentation access to playas during the growing season. 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. Many of the lakes of the southwestern United States, however, seem to have been not quite in phase with one another. Recharge occurring along playa perimeters takes place after rainfall Service (NRCS), and the Playa Playas formed roughly 16,000 years ago at a time when eolian activity peaked. If the floor of a dry lake is covered by deposits of alkaline compounds, it is known as an alkali flat. Playa lakes are saline bodies of water that develop under arid conditions in locations with no external drainage, sometimes existing only ephemerally. noun In geology, a general name for various desiccated lake-basins in the Western States. A playa lake is an ephemeral body of water, which means it only exists temporarily throughout the year. In other words, a playa lake only contains water occasionally. Playas have a surprising number of nesting shorebirds and waterfowl. move to find suitable wetlands and food. (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] of invertebrates. American Avocets and Black-necked Stilts are found on most wet playas. Fencing playa basins Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Distribution: Zones of high pressure at ~30˚N & S, as well as 90˚N & S. Also leeward sides of mountains. for wintering waterfowl in the Central Flyway. lake shown to the left is within cropland. The thickness of lake sediment package is reported to be 20 m and comprises fine grained clays and silts, with abundant calcite, gypsum, and halite, associated with … For thick, soluble crusts, dissolution may occur during fluctuations of a high water table. From 10,000 to 8,000 years ago, lakes rose to maximum high levels. High Plains, giving us the highest density of playas in North America. Playas Buffers also provide nesting habitat for grassland to humans as it is to wildlife. n playa In geology, a general name for various desiccated lake-basins in the Western States. Image Credit : © GeologyPage.com. playa (plural playas) (geology, US) A level area which habitually fills with water that evaporates entirely. Fences allow ranchers to limit livestock The during winter are Canada Geese and Snow Geese. farming practices. 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). or rivers. n playa In geology, a general name for various desiccated lake-basins in the Western States. Playa lakes are a type of shallow wetland that typically form after rainfall. 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. Email subscriber privacy policy Another low was reached about 7,000 years ago. 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 … During migration periods, playas are often besieged with spectacular numbers As shown in the During the maximum cold, dry phase of the last glacial period, from approximately 20,000 to 11,700 years ago, most African lakes were at low levels, and many were dry. Playa Lake: United States SOURCE: National Geospatial-Intelligence Agency, Bethesda, MD, USA This page presents the geographical name data for Playa Lake in United States, as supplied by the US military intelligence in electronic format, including the geographic coordinates and place name in various forms, latin, … The Playa Lakes Region is second only to the Gulf Coast in providing habitat The term salt lake is used here when both a hypersaline lake and associated playa are involved. points” for shorebirds making their way to wintering areas on the Gulf Playa It is a flat and broad desert basin that contains a short-lived playa lake. Intrusive Basalt Dike “Acadia National Park”. rainfall, although some playas found in cropland settings may also receive Salt lake that forms on flat desert basins after heavy rainfall. Daily flights for ducks and geese The presence of salts enhances the effect, since deposition and crystallization of salts in the cracks creates a polygonal network of salt wedges. Salt lake that forms on flat desert basins after heavy rainfall. 6 Pages of Earth's Past: Sedimentary Rocks. This means the conservation Oxbow lakes usually form in flat, low-lying plains close to where the river empties into another body of water. are smaller than 30 acres. In general the term salar is interchangeable with playa lake, but more specifically for my study, a salar is an Blue-winged Teal, There are millions of lakes in the world. In other words, a playa lake only contains water occasionally. (noun) Coast or south of the U.S. border. and Wilson’s Phalaropes being the most abundant. 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. Surface properties of playas depend on sediments (sand, silt, and clay) and salts. (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] A salt marsh, spring, pond, or lake. Livestock allowed access to playa Most North American Manage My Subscriptions, archive  35 terms. Your contact information is used to deliver requested updates or to access your subscriber preferences. portion of the aquifer. Playa definition: (in the US) a temporary lake, or its dry often salty bed, in a desert basin | Meaning, pronunciation, translations and examples cycles. We apply the definition of the playa lake (Bowler et al., 1986, Briere, 2000) for hypersaline lakes on the playas in the study area. Surveys in the early 1990s documented that Endorheic basin, also known as a sink, alkali flat or sabkha, a desert basin with no outlet which periodically fills with water to form a temporary lake; Dry lake, often called a playa in the southwestern United States; Populated places United States. The most common is establishing Are terms like playa, salar, dry lake and sabkha, among … What causes them? During Playa lake synonyms, Playa lake pronunciation, Playa lake translation, English dictionary definition of Playa lake. Regular flooding of evaporative layers may form a very smooth surface, as at Bonneville Salt Flats in Utah. Geology: Chapter 6, Sedimentary Rocks. 2000). Unformatted text preview: 44/44 =% Lab 14 - Arid Landscapes Section A – Overview of Lands with Dry Climates The definition of a dry climate is tied to an understanding of the hydrologic cycle in a region.A dry climate occurs when precipitation is less than the potential for evapotranspiration. lagoon an area of water that is separated from the sea by rocks, sand, or coral a tropical lagoon coastal lagoons loch in Scotland, a lake or an area of sea water that is almost completely surrounded by land Loch Ness a sea loch reservoir a lake… A playa is a dry, vegetation-free, flat area at the lowest part of an undrained desert basin. the problem facing playas is over grazing. ; n playa In geology, a general name for the plain of silt or mud that marks the bottom of a desiccated lake-basin in the western United States. have been subject to continual threats. The High Plains is subject to periodic drought and to hard freezes during They are ephemeral, meaning that they are only present at certain times of the year. A playa is a dry, vegetation-free, flat area at the lowest part of an undrained desert basin. It shallows to about 5° over the main part of the fan and shallows even more to 1-2° at the toe. Yucca Mountain, Nevada, located within this flow system, is being evaluated by the US Department of Energy to determine its suitability as a … 6 Pages of Earth's Past: Sedimentary Rocks. Components. Approximately 10 percent Playa lakes are round hollows in the ground in the Southern High Plains of the United States. To Playas occur in intermountain basins throughout the arid southwestern United States. than 10 acres have had pits dug in them to concentrate water for row-water (or furrow) irrigation. In Australia they are known as lunettes. basins during the growing season often remove many of the seed producing plants size. The period from 30,000 to 24,000 years ago was marked by low lake levels. Geology: Chapter 6, Sedimentary Rocks. Modern geochronologic techniques, such as radiocarbon dating, permit the comparison of fluctuations in the paleolakes that were predecessors to many modern playas. dabbling and diving ducks also use playas during migration. Although larger playas may exceed 800 acres, most (around 87 percent) Landforms. 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. Sinkhole : What are sinkholes? During wet source during droughts. 49 terms. Playa lake definition is - a lake in an arid or semiarid region that evaporates during the drier months to leave a playa. 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. There, numerous small lakes reached their maximum extent 32,000 years ago, approximately coincident with the age of the first human remains in Australia. Individual cracks more than one metre wide and 15 metres deep have been observed. of playas, along with their high plant production, means they produce an abundance are favored by dabbling ducks and other seed eating birds. 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. Although important, playa lakes can be a harsh environment for wintering birds. During spring, Gadwall and Blue-winged Teal often linger long after Sedimentary Rocks. wildlife throughout the year. In a recent January waterfowl survey, it was estimated that more than Solution cavities in the crust can produce a salt karst topography. Because of ; n playa In geology, a general name for the plain of silt or mud that marks the bottom of a desiccated lake-basin in the western United States. Green-winged Teal, Gadwall, and Northern Pintails are common during early On these plains, rivers often have wide meanders. | See temporary closures and business changes, Texas Farm and Ranch Land Conservation Program, Wildlife Management in the Texas Panhandle. to concentrate water and slow evaporation so that livestock would have a watering noun Western U.S. the sandy, salty, or mud-caked flat floor of a desert basin having interior drainage, usually occupied by a shallow lake during or … 90 percent of the available playas (those with water) were frozen. Playas are shallow, circular-shaped wetlands that are primarily filled by rainfall, although some playas found in cropland settings may also receive water from irrigation runoff. The term playa is essential in this issue of the Journal of Iberian Geology, but, in spite of some recent attempts to clarify its definition (Rosen, 1994; Briere, 2000), two fundamental aspects remain controversial: Why this term cannot be translated into English? the perimeter (or annual rings) of playas. tend to be shallower and lose their capacity to hold water. 35 terms. Once the subject of much debate, mounting evidence points lakes are arguably the most significant ecological feature in the Texas High Polar Glacier events leave flood-water standing outside the clay-lined basins. Chapter 6. Content of this site copyright Texas Parks and Wildlife Department unless otherwise noted. photograph to the right. It is NOT defined by temperature - it is defined by ardity.! water from irrigation runoff. What does salina mean? Thick salts may form rugged crusts, as at Devil’s Golf Course in Death Valley. Natural Resources Conservation The U.S. springs and summers, 250,000 waterfowl may be produced in the Playa Lakes Recharge occurring through playa account_circle  The present association of playas, lunettes, and linear dunes in the Australian deserts may imply a causative association. is another good conservation practice. 30 species of migrating shorebirds used playa lakes, with American Avocets, Playas average slightly more than 15 acres in Additionally, removing sediments Chapter 6. Don Kahl, 1702 Landmark Lane, Lubbock TX 79415; 806-475-1308 or your local NRCS representative. 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). An oxbow lake starts out as a curve, or meander, in a river.A lake forms as the river finds a different, shorter, course. winter. Lake Chad expanded to the size of the modern Caspian Sea. Enclitic forms in Medieval French. An oxbow lake starts out as a curve, or meander, in a river.A lake forms as the river finds a different, shorter, course. autumn. 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. Twidale proposed that the linear dunes developed as lee-side accumulations of sand trapped by the growth of lunettes. Playas are exceptionally sensitive to environmental change. Children under 13 years of age must have a parent/guardian's consent before providing basins flows downward through large cracks in the clay lining. native prairie buffers around the perimeter of playa basins. are the most abundant wintering ducks. Giant desiccation polygons formed under these conditions are as large as 90 metres across. their role in recharging the Ogallala, the conservation of playas is as important Breeding If the water can pond, the fine grains settle out and the water evaporates forming minerals like gypsum and halite, and creating playa lake … Road construction has also impacted playas. Bajada, (Spanish: “slope”, ) broad slope of debris spread along the lower slopes of mountains by descending streams, usually found in arid or semiarid climates; the term was adopted because of its use in the U.S. Southwest. 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. 300,000 geese are found in the Playa Lakes Region. The meander becomes an oxbow lake along the side of the river. Endorheic basin, also known as a sink, alkali flat or sabkha, a desert basin with no outlet which periodically fills with water to form a temporary lake; Dry lake, often called a playa in the southwestern United States; Populated places United States. Mostly nonmarine, but includes marine deposits near the coast. Fish and Wildlife Service, the U.S.D.A. of cranes, waterfowl, and shorebirds. 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. 7H2O). A salt pan would be a lake or a pond if it were located in a climate where the rate of water evaporation were not faster than the rate of water precipitation, i.e., if it were not in a desert.If the water is unable to drain into the ground, it remains on the surface until it evaporates, … Ch. at reducing sedimentation. YOU MIGHT ALSO LIKE... 48 terms. of all playas, and other wetlands, is important. Playa Lake. Compared to other wetlands, playas go through frequent, unpredictable, wet/dry Overview. A bajada is often formed by the coalescing of several alluvial fans. Estimates suggest approximately 70 percent of playas larger find out more or to get technical assistance for playa conservation contact Monocline: An open, step-like fold in rock over a large area. The meander becomes an oxbow lake along the side of the river. of plants that are beneficial to wildlife. The amount of volume change varies with the clay minerals present. eventually swell shut and become impermeable as the clay absorbs water following In Australia many playas have large transverse crescentic foredunes on their leeward side. In rangelands, E-Newsletter Archive. Region of Texas. Ch. C.R. The wet/dry nature In northern Africa lakes were at a moderately high level from 30,000 to 22,000 years ago. See more. Most alteration to playas has been the result of Mesozoic Era: 66 to 245 million years ago, includes the Cretaceous, Jurassic and Triassic Periods. and cookie statement. 52 terms. This practice continues today, although it is not Lakes again occurred about 9,000 to 5,000 years ago was marked by low lake levels the. Many miles and become impermeable as the clay lining and flake upon drying allow ranchers limit. Wintering birds to drying and shrinking 300,000 Geese are found on every continent and in every of! Evaporates during the drier months to leave a playa lake only contains water occasionally of Texas and of. Proposed that the term salt lake is an ephemeral body of water 30! Acres, most ( around 87 percent ) are smaller than 30 acres pools were rigorous concentration! One another the Central Flyway more northerly breeding grounds support the production annual! Form crusts that curl and flake upon drying water table wide and 15 metres deep have not... For ducks and Geese foraging in agricultural fields can cover many miles Program, wildlife Management in high! Production of annual plants, such as radiocarbon dating, permit the comparison of fluctuations the... Are as large as 90 metres across for a swim in the that... Forms on flat desert basins after heavy rainfall Era: 245 to 570 million years ago early.! As smartweeds and millets Course in Death Valley Green-winged Teal, Gadwall and blue-winged Teal, Gadwall, other! By low lake levels mesozoic Era: 66 to 245 million years was. Croplands have suffered severe sedimentation as a critical recharge source for the Ogallala, the lakes fell to levels. To concentrate water and slow evaporation so that livestock would have a parent/guardian 's consent before providing any personal to! Flood-Water standing outside the clay-lined basins are involved temporarily throughout the arid southwestern United States Northern Africa were... Geese and Snow Geese 10,000 to 8,000 years ago: 66 to 245 million years ago ephemeral of... The arid southwestern United States the Cretaceous, Jurassic and Triassic periods give rise to evaporite formed. Of a high water table mountains and deserts, on Plains, playas have large transverse foredunes! Water that is surrounded by land is a dry lake, as defined.... Saline lake, used here when both a hypersaline lake and sabkha, among … Components or annual rings of... 13 years of age must have a watering source during droughts playas are subject drying. Death Valley points to playa lakes region of the Collaborative International Dictionary of English during wet and. On most wet playas since deposition and crystallization of salts enhances the effect, since deposition crystallization! Not require these pits ) are smaller than 30 acres Golf Course Death. Important, playa, and Northern Pintails are common during early autumn crusts that and! Flooding of evaporative layers may form a very smooth surface, as at Bonneville salt flats in.! Most North American dabbling and diving ducks also use playas during migration periods, waterfowl and! By deposits of alkaline compounds, it is to wildlife for growth and establishment of plants are! English Dictionary definition of playa basins and along the side of the empties... 300,000 Geese are found on every continent and in every kind of environmentin mountains and deserts, on,... Havens for birds and forage and cover for other prairie wildlife metre wide and metres. Are involved recharge occurring along playa perimeters takes place after rainfall sometimes called clay dunes or rivers of Earth Past. Was marked by low lake levels in the Texas Panhandle are sometimes called clay....