Geology and Minerals
The Arroyo Penasco Group is a group of geological formations exposed in the Nacimiento, Jemez, Sandia, and Sangre de Cristo Mountains of northern New Mexico. It preserves fossils characteristic of the late Mississippian.
Fruita, Colorado.
Cascade-Sierra province.
Text from Wikipedia; plate via Wikimedia Commons. Text CC BY-SA 4.0; plate freely licensed (see Commons). Source record. Images and catalogue data are reproduced from open-access collections.