What is a drumlin?

What is a drumlin?

• A. A streamlined hill formed by glacial deposition
• B. A volcanic dome formed by magma
• C. A lake formed by glacial meltwater
• D. A canyon carved by a glacier

Answer: (A)

A drumlin is a streamlined hill formed by glacial action, built from sediments carried and deposited by moving ice. The long, smooth shape runs parallel to the direction of ice flow, with a tapered, downstream end as the glacier reshapes and deposits till along the landscape. This makes drumlins distinct from other glacial features that are not hills formed by deposited sediment. The other options describe features that aren’t hills shaped by glacial deposition: a volcanic dome is formed by magma, a lake is a body of water created by meltwater, and a canyon carved by a glacier is a deep valley.

A drumlin is a streamlined hill formed by glacial action, built from sediments carried and deposited by moving ice. The long, smooth shape runs parallel to the direction of ice flow, with a tapered, downstream end as the glacier reshapes and deposits till along the landscape. This makes drumlins distinct from other glacial features that are not hills formed by deposited sediment.

The other options describe features that aren’t hills shaped by glacial deposition: a volcanic dome is formed by magma, a lake is a body of water created by meltwater, and a canyon carved by a glacier is a deep valley.