Frank Howland at Trigonias Quarry Excavation
Stefanie A. Derkatsch
scanning technician or creator of digital collection
Frank Howland inside one of the first holes opened up at the Trigonias Quarry. The excavation site was quite significant yielding the remains of a variety of prehistoric rhinoceroses including at least three complete Trigonias skeletons as well as at least thirty-seven skulls, fifty-nine pairs of mandibles, eight pelvic girdles, eight trays of vertebrae, several complete sets of ribs, and numerous limb bones. Duplicate fossils were used in exchange with various institutions across the country including The Field Museum and Harvard University. Location: near Horsetail Creek.
date of photograph
USA, Colorado, Weld County
3 X 4 black and white contact print scanned with Epson Exprssion 10000XL at 900dpi, 8bit grayscale with unsharp unsharp mask level high.
use with permission Denver Museum of Nature & Science