Author Question: What are dropstones, and what do they indicate? What will be an ideal ... (Read 12 times)

nelaaney · **on:** Jul 15, 2018

What are dropstones, and what do they indicate? What will be an ideal response?

Question 2

How does a terminal moraine differ from a recessional moraine? What will be an ideal response?

tanna.moeller · **Reply #1 on:** Jul 15, 2018

Answer to Question 1

Dropstones are gravel- to boulder-sized rocks found in otherwise fine-grained glacial lake deposits.
They indicate transport of the rocks into the lake by icebergs that eventually melted, releasing the
coarser sediment

Answer to Question 2

The terminal moraine marks the farthest limit of the ice advance; the recessional moraine marks the
position of the ice during a period of retreat