Core Research Center

Middle Park Fossils from the USGS-Denver Collections

by Kevin C. McKinney, Robert O'Donnell, and William A. Cobban

Ammonites

Ammonites

Vertebrates

Vertebrates

The USGS-Denver has a particularly large collection of fossils from the region around Middle Park, Colorado. In conjunction with geological mapping projects between 1960 and 1975, a diverse array of mammal fossils were collected from the Middle Park Troublesome Formation by Glen Izett, Ed Lewis, and Bob O'Donnell. During the same period Glen Izett and Bill Cobban collected Cretaceous ammonites and inoceramids. The fossils were instrumental in providing stratigraphic age control for the geologic mapping projects.

Fossil locations near Middle Park, Colorado

Approximate locations of vertebrate and ammonite fossils in the area of Middle Park, Colorado

(Public domain.)