Back in the Triassic, 290-210 million years ago, massive marine reptiles — the ichthyosaurs — hunted in the shallow sea that blanketed what would become Nevada We find them now as fossils embedded in the Earth. The quality of preservation at localities like Fossil Hill in the Humboldt Mountains of Nevada, perhaps the most famous and important locality for the Middle Triassic (Anisian/Ladinian) of North America, is truly outstanding. Aside from sheer beauty and spectacular preservation, the ammonoids and belemnites were tucked in cosily with very well preserved ichthyosaur remains.