Their formation requires the combination of specific geologic conditions that are usually found in volcanic terrain. Two valley glaciers flow around a small horn and merge together to form a larger valley glacier. Restoration of wetlands that absorb flood waters. Most glaciers lie within mountain ranges that show evidence of a much greater extent during the ice ages of the past two million years, and more recent indications of retreat in the past few centuries. In cold regions (either towards the poles or at high altitudes), more snow falls (accumulates) than melts (ablates) in the summer season. The glacier is in retreat because only a portion of the glacially carved, U … How to Build a Dam: Current Construction Methods & the Need for Innovation. Hardy describes nesting conditions on the ice cap, at nearly 19,000 feet, as brutal for weeks on end with low oxygen, bitter cold, heavy snow and high winds. This is what causes glacial ice to appear blue. C) The elevation of the area must be high enough to allow snow to fall regularly. Geysers are usually associated with volcanic areas. The question, how does a geyser form, can not be answered quickly. What condition is most necessary to build a glacier? Damming has been an important engineering practice for thousands of years, with the first dam being constructed by Ancient Egyptians around 2800 B.C. This compression forces the snow to re-crystallize, forming grains similar in … D) More snow must fall in the winter than melts in the summer. The compression of the glacier continues for dozens, hundreds or even thousands of years, adding more and more layers on top and adding even more weight. Which of the following climate conditions would most likely allow glaciers … A glacier (US: / ˈ ɡ l eɪ ʃ ər / or UK: / ˈ ɡ l æ s i ər, ˈ ɡ l eɪ s i ər /) is a persistent body of dense ice that is constantly moving under its own weight. What is probably the single most important, original, depositional feature in sedimentary rocks? 5. A) The temperature must be cold enough to cause snow to fall regularly. Once upon a time, the larger valley glacier flowed down the whole length of the valley, carving out a U-shaped valley. Cold wet conditions for a glacier to form. A glacier is a large, perennial accumulation of crystalline ice, snow, rock, sediment, and often liquid water that originates on land and moves down slope under the influence of its own weight and gravity. The duration or " life span" of a geyser is at the most several thousand years. A glacier is a pile of snow and ice. The Army Corps of engineers build man-made levees to protect homes. Glaciers begin to form when snow remains in the same area year-round, where enough snow accumulates to transform into ice.Each year, new layers of snow bury and compress the previous layers. 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