Geo 11

Created by LeneKeating 

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Which of the following is the correct listing of the North American glacial stages from older to younger?

Nebraskan, Kansan, Illinoian, Wisconsinan

A ________ forms when stagnant, glacial ice melts after being buried by drift.

kettle

How do icebergs in the North Atlantic Ocean originate?

by calving of large piedmont glaciers in Greenland

A(n) ________ is likely to host a waterfall or steep rapids today.

hanging valley

________ is one of the two major flow mechanism in a glacier.

Basal slip

Where is the world's second largest continental ice sheet?

Greenland

A _____ is an erosional feature specifically produced by alpine glaciation.

U-shaped valley

Where is the world's largest ice sheet located today?

Antarctica

A cirque represents an erosional feature formed in what was an important accumulation zone for snow and ice at the upstream head of a glacier.

True

Which process occurs where a glacier enters the sea?

calving

A ________ cross-valley profile is typical of canyons and valleys eroded and deepened by alpine or valley glaciers

U

Which one of the following applies to a valley glacier that lengthens (extends its terminus downslope) over a period of many years?

accumulation exceeds wastage

Rock flour consists of silt-sized, rock and mineral particles produced by glacial abrasion.

True

What type of moraine is formed by the merging of two lateral moraines at a junction of two valley glaciers?

medial

________ are both deposited by meltwater streams.

Outwash plains and valley trains

Rapid surge movements of the Earth's tectonic plates offer a convincing explanation for the advances and retreats of the Pleistocene ice sheets.

False

A ________ would logically be situated next to a large end moraine or terminal moraine.

outwash plain

A fiord is ________.

a stream valley, deepened by glacial erosion, that floods as sea level rises

Eccentricity, obliquity, and precession are three factors involved in the Milankovitch astronomical explanation of why the Pleistocene continental ice sheets alternately grew and shrank in size.

true

When a glacier is retreating, the upstream ice is still moving forward toward the downstream terminus of the glacier.

true

Arêtes, horns, and U-shaped valleys are erosional features carved from bedrock by glaciers.

true

________ are erosional features produced by valley/alpine glaciers

cirques

Till is an unsorted sediment deposited directly from the melting glacial ice; stream action is not involved

true

Great Salt Lake in Utah is the shrunken, salty remnant of a much larger, Pleistocene, pluvial lake called Lake Bonneville.

true

Abrasion and plucking generally involve what part of a glacier?

the basal, sliding zone

All of the following are thought to possibly contribute to the formation of glaciers except for ________.

comets

The downstream end or snout of a glacier advances over periods of time during which ablation exceeds accumulation.

false

A ________ is a glacier-cut valley that partly flooded as sea level rose.

fiord

Crevasses are short, narrow cracks in the plastic flow zone of a glacier that alternately open and close as the ice flows along.

false

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