Glacio-fluvial
Fragment of a discussion from Course talk:APBI200/Archive/2016-17WT2
Yehuda, if glacial till is reworked by water the fines (silt and clay) will be "washed" downstream. Because glaciers carry so much material, there is not enough energy in the water to move all the material. Thus glacio-fluvial deposits are sub-rounded, and coarse.
SandraBrown (talk)