Why does a roche moutonnée have smooth and rough slopes?
Answer and explanation
Correct answer: Glacier abrades the stoss side and plucks the lee side
A roche moutonnée records the direction and unequal work of moving glacial ice. On the stoss, or upstream-facing, side, ice loaded with debris presses against the bedrock and smooths it by abrasion. As ice passes over the summit, pressure is reduced on the lee side; joints allow blocks to be loosened and plucked away, leaving a rough, steep slope. Thus option D is correct; wind, rivers, and waves do not produce this paired glacial form.
Frequently asked questions
What is the correct answer to this question?
Glacier abrades the stoss side and plucks the lee side
Why is this the correct answer?
A roche moutonnée records the direction and unequal work of moving glacial ice. On the stoss, or upstream-facing, side, ice loaded with debris presses against the bedrock and smooths it by abrasion. As ice passes over the summit, pressure is reduced on the lee side; joints allow blocks to be loosened and plucked away, leaving a rough, steep slope. Thus option D is correct; wind, rivers, and waves do not produce this paired glacial form.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Recording of Transactions (I & II). Topic: Covers the accounting equation.
