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