Geology: Slate to Gneiss Metamorphic Rocks
21:41
Rock Identification with Willsey: Foliated Metamorphic Rocks - Slate, Phyllite, Schist, and Gneiss
19:17
Rock Identification with Willsey: Nonfoliated Rocks - Quartzite and Marble
10:23
Schist!
19:35
60 hours of work to expose this rare fossil skull (showing the full process)
12:10
Quartz vs. Quartzite
20:22
Skagit Gneiss along Highway 20
14:12
Granite Gneiss, how to identify granite gneiss.
18:31