Page 364 - Laboratory Manual in Physical Geology

Horn Arête
Hanging
valley Cirque
Paternoster
Tarn lakes
Tarn

Waterfall
Lateral
moraines

Medial
moraine

U-shaped valley
carved by
valley glacier
Present-day
misfit-stream valley
Ground
moraine

FIGURE 13.4 Erosional and depositional features of mountain glaciation. The same region as FIGURE 13.3 , but showing erosion
features remaining after total ablation (melting) of glacial ice.

ACTIVITY by glaciation in the park developed during the Wisconsinan
glaciation that ended about 11,700 years ago. Today, only
13.4 Glacier National Park small cirque glaciers exist in the park. Thirty-seven of
Investigation them are named, and nine of those can be observed on the
topographic map of part of the park in FIGURE 13.14 .

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THINK How do glaciers affect landscapes?
About It How is the cryosphere affected by
climate change? ACTIVITY

OBJECTIVE Analyze glacial features in Glacier 13.5 Nisqually Glacier Response

National Park and infer how glaciers there may change to Climate Change
in the future.
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PROCEDURES THINK How is the cryosphere affected by
1. Before you begin , read about Glacial National About It climate change?
Park, Montana below. Also, this is what you

will need : OBJECTIVE Evaluate the use of Nisqually Glacier as
a global thermometer for measuring climate change.
____ calculator
____ Activity 13.4 Worksheet (p. 352 ) and pencil PROCEDURES
2. Then follow your instructor’s directions for 1. Before you begin , read Nisqually Glacier—A
completing the worksheets. Global Thermometer? Also, this is what you
will need :
____ ruler
____ Activity 13.5 Worksheets (p. 353–354 ) and
Glacier National Park, Montana pencil

Glacier National Park is located on the northern edge 2. Then follow your instructor’s directions for
of Montana, across the border from Alberta and British completing the worksheets.
Columbia, Canada. Most of the erosional features formed

334 ■ L ABOR ATORY 13