Day #64 Deskcrop: Arkosic Arenite

We’ll end the work week with a deskcrop from high in the Colorado Rockies: an arkosic arenite (sandstone) from Vail Pass, Colorado. This rather immature sedimentary rock is rich in both K-feldspar and micas, giving it its distinctive reddish color. The rock has a Pennsylvanian depositional age, and was formed in association with the uplift of the Ancestral Rockies.

IMG_9402
Arkosic Arenite

Explore this and all of my 2010 Deskcrops and Outcrops in Google Earth!