Over at
http://inyo.coffeecup.com/site/ammonitecanyon/ammonitecanyon.html I've uploaded my latest web page, "A Visit To Ammonite Canyon, Nevada."
It's a virtual field trip to one of the best places in the world to explore a marine-originated geologic section that records the end-time late Triassic Period mass extinction some 200 million years--in addition to invertebrate faunal associations that eventually succeeded the Triassic doomed days during the early Jurassic, roughly 198 to 193 million years ago.
Includes detailed text, on-site images and photographs of representative fossils from Ammonite Canyon.