|The sediment deposited by debris-laden melt water is called _______.
|Above the rigid zone, glacial ice movement is due to __.
||passive riding of the ice on the glacier
|The grinding of rock against rock by a glacier produces a very fine sediment called ____.
|____ are landscape features that indicate a mountainous area has been glaciated.
||Cirques, horns, and arêtes|
|Glaciers can be considered as _______ of fresh water for future use.
|Once a glacier is gone the land begins to uplift slowly to its pre-glacial height, a process called ____.
|___ moraines are elongate low mounds of till that form along the sides of valley glaciers.
|The _____ is the end of a glacier.
|The upper part of a glacier, the part with perennial snow and ice, is called the __.
||zone of accumulation
|A worldwide decrease of at least _____°C in temperature would bring about a new glacial age.
|As ice retreats by melting back, the rock debris carried by the glacier is deposited to form a relatively thin layer of till called a(n) ___________.
|A(n) _______ is a mass of ice that is not restricted to a valley but covers large areas of land.
|A(n) ___________ is an ice-transported boulder that was not derived from the underlying bedrock.
|A(n) _____ is a coastal inlet that is formed by a drowned glacial carved valley.
|A(n) ____ is a long sinuous ridge of water-deposited cross-bedded and well-sorted sediment deposited by a stream that flowed within or under a glacier.
|The central portion of a valley glacier moves _____ the sides.
|When an ice block that was buried in sediment finally melts a depression called a ___ forms.
|A(n) ______ is a steep-sided half-bowl shaped recess carved at the head of a mountain glacial valley.
|A(n) _____ is the sharp peak that remains after cirques have cut back into a mountain on several sides
|The down-valley part of a glacier is the ____, where melting, evaporation, and calving take place.
||zone of ablation|
|___ are the product of past glaciations.
||The Great Lakes
|______ first suggested that glacial/interglacial episodes are related to variation in solar radiation cycles.
|If the terminus of a glacier remains stationary for a few years a distinct _______ may form.
|If a moving glacier reaches a body of water ______ float free.
|A glacier will flow faster where it is steeper and _____.
|What caused the glacial ages?
||All of the above have contributed to the glacial ages.
|Two layers of sediment resulting from one year's deposition in a glacial lake are called ___.
|A(n) _____ -shaped valley (in cross section) is characteristic of glacial erosion.
|Under the influence of gravity a glacier moves down valley and eventually __.
|A large trunk glacier carves a deeper valley than smaller tributaries. After the glacier disappears the tributary valley remains as _____ high above the main valley.
||a hanging valley|
|If all ice sheets were to melt, sea level would _____.
||rise by over 60 meters
|Open fissures called ___ develop in the brittle surface ice of glaciers.
|The boundary between the zone of accumulation and the zone of ablation is an irregular line called the _____.
|Bodies of till shaped into streamlined hills are called ___.
|The theory of _____ states that at times in the past, colder climates prevailed during which much more of the land surface was glaciated than at present time.
|A(n) ___ is a lake occupying a bedrock depression excavated by a glacier.
|Sharp ridges called ___ separate adjacent glacially carved valleys.
|Where tributary glaciers come together the adjacent lateral moraines join to form a ______ moraine.