Chapter 14

________ is one of the two major flow mechanisms in a glacier. Basal Slip Crevassal slip Frost heaving Morainal sliding

Which process occurs where a glacier enters the sea? kaming calving surging drowning

Abrasion and plucking generally involve what part of a glacier? the internal, flowage zone the snout zone the surface, brittle zone the basal, sliding zone

A ________ is an erosional feature specifically produced by alpine glaciation. lateral moraine drumlin U-shaped valley crevasse spur

A fiord is ________. a stream valley, deepened by glacial erosion, that floods as sea level rises a glacier-cut valley that is dammed by an end moraine and a large lake is formed a glacier-cut valley which sinks below sea level due to glacial rebound after the ice melts a large, kettle-pocked moraine left as an island when sea level rises following melting of the ice

________ is an irregular, usually thin till layer laid down by a retreating glacier Terminal moraine Ground moraine Lateral moraine Outwash blanket

Which of the following best describes the term glacial drift? floating of icebergs southward from the north polar seas slow, plastic flow movement in the brittle zone of a glacier the sedimentary materials outwash and till the slow, southward advance of the continental ice sheets over Canada and North America during the Pleistocene

A(n) ________ is similar in appearance to a sinkhole of a karst area. moraine esker cirque kettle

Which one of the following statements concerning glaciers is NOT true? Ice sheets are larger than ice caps. Piedmont glaciers form on lowlands at the base of mountainous terrain. The volume of water tied up in the Antarctic ice sheet is about the same as the total discharge of the Amazon River in one year. Long, extended, alpine glaciers occupied valleys in most high, mountainous areas in the United States, Canada, and Europe at one or more times during the past two million years.

________ first developed the theory that small variations in the Earth-Sun distance were responsible for short-term, climatic oscillations (1000 to 100,000 years). H. Goering H. Marcee M. Milankovitch G. Zukhov