Which one of the following statements concerning glacial deposits is NOT true?
A)Till is deposited directly from the ice; outwash is deposited by meltwater streams.
B)Tills are poorly sorted and the fragments are mostly angular.
C)Glacial erratics are blocks of rock that are too large for the glacier to move.
D)Outwash is mainly stratified sand and gravel.

Question

Quizplus · Accepted Answer

Glacial erratics are not necessarily too large for a glacier to move; they are simply rocks that are carried by a glacier and deposited outside of their original location. Some erratics can be very small, while others can be very large. The other three statements are all true: till is deposited directly from the ice, tills are poorly sorted and angular, and outwash is mainly stratified sand and gravel deposited by meltwater streams.

Which One of the Following Statements Concerning Glacial Deposits Is