Question

Glacial deposits are formed when which rocks are grasped and dislodged by meltwater refreezing in the cracks of rocks and then being dragged along by the force of glacial movement?

1) Igneous rocks
2) Sedimentary rocks
3) Metamorphic rocks
4) All of the above

Answer 1

Glacial deposits can be formed from any type of rock, including igneous, sedimentary, and metamorphic. These rocks are plucked from the landscape by meltwater refreezing in cracks and then carried along by the movement of the glacier.

Step-by-step explanation:

Glacial deposits, also known as glacial till, are formed from materials that glaciers pick up and transport as they move. The process you're asking about is known as plucking, where meltwater seeps into the cracks of rocks, freezes, expands and then breaks off pieces of rock as the glacier advances. This can happen to all types of rocks including igneous, sedimentary, and metamorphic rocks.

When it comes to igneous rocks, they form from the cooling and solidification of magma or lava. Sedimentary rocks are made from deposited material that is then cemented together. Metamorphic rocks originate from existing rocks that have been subjected to heat and pressure that cause them to change. All of these rocks can be affected by glacial movement, making the correct answer to your question 4) All of the above.