What mature desert landscape feature consists of coalesced alluvial fans quizlet?
Bajadas develop from coalescence of alluvial fans along fronts of mountain ranges in arid lands. The steeper, lee slope of a sand dune is called the slip face. Running water is an important erosional agent in many arid lands despite infrequent rainfalls.
How is desert pavement formed quizlet?
How is desert pavement formed? they form through the gradual removal of sand, dust and other fine-grained material by the wind and intermittent rain, leaving the larger fragments behind.
Which of the following best describes the climatic factors that cause low latitude deserts like the Sahara in Africa Group of answer choices?
Which of the following best describes the climatic factors that cause low latitude deserts like the Sahara in Africa? Cool, dry air aloft is descending; surface winds are blowing toward the equator.
What observations of desert pavements undercut the hypothesis that desert pavements form through deflation choose all that apply?
What observations of desert pavements undercut the hypothesis that desert pavements form through deflation? –Windblown silt can accumulate and infiltrate through the pebbles. -There are few to no pebbles found in the sediment beneath the desert pavement.
Which of the following best describes the climatic factors that cause low latitude deserts?
Which of the following best describes the climatic factors that cause low latitude deserts like the Sahara in Africa? Cool, dry air aloft is descending; surface winds are blowing toward the equator.
What are Inselbergs quizlet?
Inselberg. isolated hills on the pediment formed from erosion remnants of mounts (cliff retreat on both sides)
What is desert pavement formed by?
A common theory suggests that desert pavements are formed through gradual removal of sand and other fine particles by the wind and intermittent rains leaving behind the large fragments. The larger rock particles are shaken into place by actions of different agents such as rain, wind, gravity, and animals.
When desert pavement is produced in a desert Why do the larger particles accumulate on the surface?
When desert pavement is produced in a desert, why do the larger particles accumulate on the surface? The wind can move particles of only a very specific size and it takes away these small particles, concentrating the larger ones.
What are two hypotheses that are used to explain the formation of desert pavement?
What are two hypotheses that are used to explain the formation of desert pavement? wind removes sand and silt from poorly sorted surface deposits until all of the fine particles are gone, leaving only pebbles that are too large to be moved by the wind.
Which of the following is a feature of a desert environment?
One thing all deserts have in common is that they are arid, or dry. Most experts agree that a desert is an area of land that receives no more than 25 centimeters (10 inches) of precipitation a year. The amount of evaporation in a desert often greatly exceeds the annual rainfall.
What are two hypotheses that are used to explain the formation of desert pavement select two correct hypotheses?
What are two hypotheses that are used to explain the formation of desert pavement? wind removes sand and silt from poorly sorted surface deposits until all of the fine particles are gone, leaving only pebbles that are too large to be moved by the wind.
Which of the following statements is the best explanation for the occurrence of the Great Basin Desert in the western United States?
Which of the following statements is the best explanation for the occurrence of the Great Basin Desert in the western United States? The Great Basin Desert exists because it is a rain shadow desert.
Which of the following statements explains how elevation influences climate?
Which of the following statements explains how elevation influences climate? The Earth's atmosphere thins as altitude increases, producing a colder climate.
What does Inselberg mean?
inselberg, (from German Insel, “island,” and Berg, “mountain”), isolated hill that stands above well-developed plains and appears not unlike an island rising from the sea. The early German explorers of southern Africa were impressed by such features, and they dubbed the domed or castlelike highlands inselbergs.
What term refers to the bouncing mode of sand transport in a windstorm or stream?
What term refers to the "bouncing" mode of sand transport in a windstorm or stream? Saltation.
Where are desert pavements formed?
Desert pavement forms on level or gently sloping desert flats, fans, or bajadas and lake and river terraces dating to the Pleistocene Epoch (2.6 million to 11,700 years ago). The percolation of infrequent precipitation tends to cause lateral and downslope movement of silt particles beneath the surface of the ground.
Where does desert pavement occur?
A desert pavement, also called reg (in the western Sahara), serir (eastern Sahara), gibber (in Australia), or saï (central Asia) is a desert surface covered with closely packed, interlocking angular or rounded rock fragments of pebble and cobble size. They typically top alluvial fans.
What is an accumulation of sand by wind deposition called?
A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate.
How is desert pavement created?
A common theory suggests that desert pavements are formed through gradual removal of sand and other fine particles by the wind and intermittent rains leaving behind the large fragments. The larger rock particles are shaken into place by actions of different agents such as rain, wind, gravity, and animals.
What process forms desert pavement?
A common theory suggests that desert pavements are formed through gradual removal of sand and other fine particles by the wind and intermittent rains leaving behind the large fragments. The larger rock particles are shaken into place by actions of different agents such as rain, wind, gravity, and animals.
What is the most important process in the formation of desert pavement?
The desert pavements which develop by wind deflation are found in depressions between sand dunes, and desert pavements which develop by mechanical weathering and soil formation are found on fluvial surfaces (terraces and alluvial fans).
What is arid land?
Deserts (arid lands/drylands) constitute about 35% of the land areas of the world and are typically characterized by rainfall scarcity, higher temperatures and evapotranspiration, lower humidity, and a general paucity of vegetation cover.
What are the main climatic features of a desert?
Temperature. During the day, desert temperatures rise to an average of 38°C (a little over 100°F). At night, desert temperatures fall to an average of -3.9°C (about 25°F). At night, desert temperatures fall to an average of -3.9 degrees celsius (about 25 degrees fahrenheit).
What process results in the formation of desert pavement?
Thus, pavements are produced by the combined effects of water and wind. Evaporation and capillarity draw soil moisture to the surface and may precipitate calcium carbonate, gypsum, and other salts that cement the pebbles together to form a desert conglomerate.
What results in the formation of desert pavement?
A common theory suggests that desert pavements are formed through gradual removal of sand and other fine particles by the wind and intermittent rains leaving behind the large fragments. The larger rock particles are shaken into place by actions of different agents such as rain, wind, gravity, and animals.
What caused the Great Basin to be so arid?
Creating a Desert The Great Basin Desert exists because of the "rainshadow effect" created by the Sierra Nevada Mountains of eastern California. When prevailing winds from the Pacific Ocean rise to go over the Sierra, the air cools and loses most of its moisture as rain.
Which mechanical weathering process will be most common in an arid environment?
Mechanical weathering will be the dominant process in arid climates; however, because of its reliance on chemical weathering, it will also be quite slow. Hydrolysis (also sometimes called hydration)causes most silicate minerals to turn into clays. An important exception is quartz which is extremely resistant.
Which of the following best explains how elevation influences temperature?
Which of the following best explains how elevation influences temperature? Higher elevations experience cooler temperatures compared to lower elevations.
What are the influencing factors of weather and climate explain?
The temperature characteristics of a region are influenced by natural factors such as latitude, elevation and the presence of ocean currents. The precipitation characteristics of a region are influenced by factors such as proximity to mountain ranges and prevailing winds.
How inselberg is formed in arid region?
An inselberg results when a body of rock resistant to erosion, such as granite, occurring within a body of softer rocks, is exposed by differential erosion and lowering of the surrounding landscape.