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25 Cards in this Set
- Front
- Back
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What controls the topography, or physical surface features, of this park?
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Faults |
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The northwest - southeast trending faults are:
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sutures between exotic terranes
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What is a terrane? |
a region with rocks and structures distinct from adjoining regions
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What is an exotic terrane? |
one that was rafted from a distant location to be accreted onto a convergent plate boundary
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What kind of rocks can be found within Glacier Bay National Park?
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igneous, sedimentary, metamorphic |
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What are the names given to the three largest terranes in the park?
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Chugach, Wrangellia, and Alexander |
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What state experiences more earthquakes than any other? |
Alaska |
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The huge seismic sea wave that occurred in Lituya Bay in Alaska is called a:
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megatsunami |
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The large body of plutonic igneous rocks that intrudes the terranes in southeastern Alaska is called the:
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Coast Range batholith
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What name is given to a drowned glacial trough?
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fjord |
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Glaciers that extend to seal level and terminate in the ocean are called: |
Tidewater glaciers |
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The large cracks in the suface of a glacier are: |
crevasses |
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When a large chunk of ice breaks off the glacier and falls into the sea, the glacier is:
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calving an iceberg |
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A small iceberg is called a: |
growler |
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A peak that sticks up above the ice in a glaciated area is called a: |
nunatak |
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Smoothed bedrock knobs with gentle upstream sides and steep downstream sides caused by glacial plucking are called:
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roches moutonnees
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Elongated mounds of loose glacial debris with a steep upstream side and a gentle downstream side are:
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drumlins |
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Long sinuous ridges of glacial till that were deposited by a stream flowing in a glacier are called:
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eskers |
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A sheet of glacial debris in front of a glacier that was deposited by meltwater coming off the glacier is:
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an outwash plain |
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What effect does the melting of thick glaciers or ice sheets have on the underlying crust?
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the land will rise or rebound
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True or False: Glacier Bay National Park and Preserve is located in northwestern Alaska.
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False, it is in southeastern Alaska |
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True or False: The bedrock geology in southern Alaska is extremely complex.
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True |
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True or False: There is no active tectonism in southern Alaska now.
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False |
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True or False: The glaciers in Glacier Bay National Park are retreating faster than glaciers anywhere else on Earth.
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True |
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True or False: Glacier Bay National Park is easily accessible by car.
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False |
