During the millions of years since that day in the Jurassic Age, many rivers, streams, lakes, and seas have deposited thousands of feet of sediment. Remnants of the plants and animals were preserved by being buried in the sediments. Over time, immense heat and pressure within the earth turned the sediments to rock and the plants and animals into fossils. In today's drier climate erosion prevails, exposing the fossil evidence of the prehistoric landscape. Today's vegetation includes seasonal wildflowers, prickly pear and hedgehod cactus, saltbush, rabbitbrush, Mormon tea, and scattered juniper trees.
Wildlife species living here include pronghorn, coyote, rabbits, bats, ground squirrels and mice.
Whip snakes, garter snakes, midget faded rattlesnakes and scorpions are seen only rarely. Through Time gives more detailed information. For additional information you may consult the Dinosaur Hill Web site, the Riggs Hill Web site, and A Guide to Dinosaur Sites in Western Colorado and Eastern Utah .