EARTH SCIENCE
OCEANS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
It is located at a high elevation in a mountainous area.
|
|
|
It is less than 25 centimeters in diameter.
|
|
|
Its composition is different from that of the bedrock under it.
|
|
|
It appears to have been intensely metamorphosed.
|
Detailed explanation-1: -Rocks that are moved by the glacier but are of the same rock type are called ‘glacially-transported’ rocks. All glacially-transported rocks and erratics tend to show evidence of that glacial transport, with scratches (striations), rounded edges and polished faces.
Detailed explanation-2: -Glaciers often form parallel scratches and grooves in bedrock because glaciers (1) deposit sediment in unsorted piles. (3) continually melt and refreeze. (2) deposit rounded sand in V-shaped valleys.
Detailed explanation-3: -The limestone bedrock formed under conditions of high heat and pressure. Older igneous and metamorphic bedrock that once covered the limestone eroded away, forming the boulders. The boulders were transported and deposited on the limestone bedrock by a glacier.
Detailed explanation-4: -The cross section shows surface elevations, valley depths, and water depths of the Finger Lakes. Which statement provides the best evidence that New York State’s Finger Lakes formed as a result of continental glaciation? The lake surfaces are above sea level.