Matt the Field Geologist

Name: Stop: 3 Colvin Mtn near Hokes Bluff
Uploaded: 2026-03-05T18:11+00:00
Description: This stop showcases the Colvin Mountain Sandstone, a Paleozoic (Ordovician?) sandstone derived from continental sediment sources. The stratigraphy here is unique to the Helena thrust sheet and does not easily correlate to the thrust sheets to the northwest and southeast.

2 videos

Looking at rocks and landscapes in the field