How are silt deposits called loess related to glaciers?

A) they accumulate in lakes trapped behind glaciers
B) they form in lakes as the lakes dried up at the end of the ice ages
C) they were deposited by large glacially caused floods in the Pacific Northwest
D) they are wind-blown accumulations and commonly are derived from glaciers

Loess deposits are primarily composed of silt-sized particles that have been transported and deposited by the wind. These deposits are often related to glaciers in that the material can originate from glacially ground rock and sediment, which, when exposed and dried, can be picked up and transported by wind to be deposited elsewhere as loess.