Mississippian Period (ambrotype by Alison Carey)
“The prospect of fossil discovery put an extra spring in his step that day. For some reason, this area is a hot spot for invertebrate fossils — crinoids, bi-valve seashells, and horn coral in particular. We stopped to rest on a large limestone slab and I scanned the vast desert below, wondering what made this desolate mountainside such a popular final resting place for ancient sea creatures.”‘It’s a combination of a few things,’ Mark Milligan told me. He explained that to understand why parts of Utah are so fossil-rich, we must look at ancient geology. Rewind past the great Lake Bonneville, past the formation of the mountain ranges and even the age of the dinosaurs to the Mississippian Period — roughly 350 million years ago — when “here” technically wasn’t here … yet.”
Thanks to Mark Milligan of the Utah Geological Survey. Click here to read the full article.