quizlette188805. 50 terms. 115 terms. ANTR - Exam 1 Sample Questions. A paper presented at a 2011 session of the American Geophysical Union, meanwhile, proposed the tower might be the ruins of a crater-pooled lava lake. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Drumlins are elongated hills of glacial deposits. Geologists are unsure exactly how drumlins form, whether a glacier scrapes up material beneath it or deposits material it already carries or a combination of both. A glacial erratic is glacially-deposited rock differing from the size and type of rock native to the area in which it rests. a. composed of outwash b. ridges formed on top of a glacier. A kettle (also known as a kettle lake, kettle hole, or pothole) is a depression/hole in an outwash plain formed by retreating glaciers or draining floodwaters.The kettles are formed as a result of blocks of dead ice left behind by retreating glaciers, which become surrounded by sediment deposited by meltwater streams as there is increased friction. Several processes may combine to form and rework a single moraine, and most moraines record a continuum of processes. Scientists believe that there were times when nearly the entire surface of the Earth was under ice and snow. quizlette188805.Exam 1. Subjects. Bed load moves by rolling, sliding, and/or saltating (hopping).. Generally, bed load downstream will be smaller and more rounded than bed load upstream (a process known as downstream fining). Because the till, sand, and gravel that form drumlins are deposited and shaped by glacier movement, all drumlins created by a particular glacier face the same direction, running parallel to the glacier's flow. It looks like your browser needs an update. Drumlins are elongated hills made up of glacial deposits. When new layers of snow fall, previous layers compress into ice. During the last glacial period more than 50 million square kilometers of land surface were geomorphically influenced by the presence of glaciers. Because of the enhancement of freeze-thaw processe… Exam 1 Questions for Final. Drumlins are formed in _____, and their tapered ends point _____. It curves convexly down the valley and may extend up the sides as lateral moraines.… d. not found singly, but in clusters . Drumlins are formed when the sediment becomes too heavy for the glacier. If there is a small obstacle on the ground, this may act as a trigger point and material can build up around it. A medial moraine consists of a long, narrow line or zone of debris formed when lateral moraines join at the intersection of two ice streams; the resultant moraine is in the middle of the combined glacier. 1. Some drumlins are formed when till is deposited on and around… Drumlins can form when the underlying bedrock is uneven Due to uneven bedrock and a fall in capacity the glacier forms… 5 Terms A glacier is formed from compacted layers of snow. Glaciers have played an important role in the shaping of landscapes in the middle and high latitudes and in alpine environments. 2. Moraine may also form by the accumulation of sand and gravel deposits from glacial streams emanating from the ice margin. The word glacier is a loanword from French and goes back, via Franco-Provençal, to the Vulgar Latin glaciārium, derived from the Late Latin glacia, and ultimately Latin glaciēs, meaning "ice". A paternoster lake is a singular lake filling a small cirque basin behind risers of rock material. They are formed when the ice is still moving. False 58. Earlier theories represented the butte as the neck of a mostly demolished volcano. When the ice extends into the ocean, the temperature of the water and even tides can influence how the floating ice shelf, or “tongue” (the part that extends into the ocean), responds. It looks like your browser needs an update. Abrasion and plucking generally involve what part of a glacier? Oh no! Drumlins are elongated hills of glacial deposits. What is a drumlin? Drumlins may be quite large, measuring up to 200 feet (60 meters) in height and 0.6 mile (1 kilometer) in length. To ensure the best experience, please update your browser. This condition causes the rock to rupture along a fault plane (area of weakness and fracture). A cirque (French: ; from the Latin word circus) is an amphitheatre-like valley formed by glacial erosion.Alternative names for this landform are corrie (from Scottish Gaelic coire, meaning a pot or cauldron) and cwm (Welsh for 'valley'; pronounced ).A cirque may also be a similarly shaped landform arising from fluvial erosion. 2016 agronomy test. Etymology and related terms. 170 terms. c. formed in the zone of fracture . CSS 202 Exam 2 Part 2. erachelc.OTHER SETS BY THIS CREATOR. Other articles where Terminal moraine is discussed: moraine: A terminal, or end, moraine consists of a ridgelike accumulation of glacial debris pushed forward by the leading glacial snout and dumped at the outermost edge of any given ice advance. As the glacier lost power, material was deposited. They are formed inside the ice, in tunnels in which meltwater streams flowed. Drumlins are found in swarms or in a 'basket of eggs' topography. Faults form when the stress applied to rock does exceed its internal strength. The glacier may have experienced a reduction in power due to melting. Drumlins look like _____ and they occur _____. As snow gets buried by repeated snowfalls, snowflakes are converted to granular snow, then firn, and finally glacial ice in a process called pressure melting. If there is a small obstacle on the ground, this may act as a trigger point and till will build up around it. In this article, we will examine some of th… A number of fault types are defined including normal, reverse, graben, horst, and strike-slip. quizlette188805.Exam 2 ANTR 350. 90 terms. It is deposited as a ridge, roughly parallel to the direction of ice movement. Oh no! The steeper 'stoss' side faces upstream and the 'lee' is more gentle, longer axis of the drumlins which indicate the direction of flow of the glacier. The glacier deposits the material, shaping it into streamlined mounds as it flows over the top. The processes and features caused by or related to glaciers are referred to as glacial. till plains; downstream 56. In this video we will learn about the formation of drumlins. They can be 1 km long and 500 m wide, often occurring in groups. 11. Kames form in the chaotic zone of melting ice, water and oozing sediment close to the ice margin. Their ability to erode soil and rock, transport sediment, and deposit sediment is extraordinary. The huge overlying weight of the ice causes increased pressure on the sediment beneath it, moulding it into the drumlin shapes. Virtually any hollow within the decaying front may fill with water and receive sediment - crevasses, moulins and larger cavities. These fan deposits may coalesce to form a long moraine bank marking the ice margin. 42 terms. Kame terraces are gentler slopes of layered sand and gravel at the side of valleys. Part 2 They are made up of unsorted material because the ice deposited all the material at the same time underneath the glacier as … Drumlins may also form when ice flows over a layer of sediment that is deeper than normal. Science Olympiad Dynamic Planet - taken from Greenhill Invitational exam 2012 Learn with flashcards, games, and more — for free. Start studying Drumlins. Flutings are mainly formed in settings similar to drumlins, but their dimensions are much smaller, with heights of 1–2 m, widths of 2–10 m, and lengths of 100–1000 m (Aario, 1990). The process of glacier establishment, growth and flow is called glaciation. The term bed load or bedload describes particles in a flowing fluid (usually water) that are transported along the bed.Bed load is complementary to suspended load and wash load.. quizlette188805. 55. Recessional moraines form at the end of the glacier so they are found across the valley, not along it. Inverted spoons; in swarms 57. Drumlins are elongated hills made up of glacial deposits. "Erratics" take their name from the Latin word errare (to wander), and are carried by glacial ice, often over distances of hundreds of kilometres.Erratics can range in size from pebbles to large boulders such as Big Rock (16,500 tonnes or 18,200 short tons) in Alberta. Not all geologists have agreed that the seed magma of Devils Tower formed as a laccolith or stock. These forms are usually obvious on aerial photographs as a group of narrow stripes in close connection with drumlins. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Often, hundreds to thousands of drumlins are found in one place, looking very much like whale backs when seen from above. To ensure the best experience, please update your browser. Discuss the particles deposited by glaciers as they advance and recede. Although glaciers cover only a small part of the Earths surface today and are constantly retreating due to climate change, the situation was very different in the past. Some drumlins are formed when till is deposited on and around… Drumlins can form when the underlying bedrock is uneven Due to uneven bedrock and a fall in capacity the glacier forms… 5 terms brandon_paradiso2. They are made up of unsorted material because the ice deposited all the material at the same time underneath the glacier as it moved down hill. Glaciers. A recessional moraine consists of a secondary terminal moraine deposited during a temporary glacial standstill. The steep slope faces up the valley and the more gently sloping 'lee slope' faces down valley. Glaciers are masses of ice formed on land by the compaction and recrystallization of snow. They are formed when the ice is still moving. Drumlins are elongated hills of glacial deposits. 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