34 10 10 http://www.paleoportal.org/media/boilerplate/0/64171_state_x_period_alt_map_34_image.jpg The western edge of North America during the Triassic would have been somewhere around the California-Nevada border. Although still in the tropics, the climate of western North America was becoming more arid as rising mountains blocked moisture-bearing winds coming from the seas. Shales, sandstones, conglomerates, dolostones, and limestones were deposited in the shallow-to-deep marine environments off the coast. Exposures in Northern California (Shasta and Plumas Counties) have yielded a diverse marine fauna, including fossils of ammonites, brachiopods, bivalves, echinoderms, and marine reptiles. <i>Avicula mucronata</i>, <i>Owenites koeni</i>, <i>Sagenites</i>, <i>Shastasaurus pacificus</i>: Sarah Rieboldt, &#169; University of California Museum of Paleontology, 2003 http://www.paleoportal.org/media/boilerplate/0/39939_state_x_period_slide_image1_34_image.jpg http://www.paleoportal.org/media/boilerplate/0/91764_state_x_period_slide_image2_34_image.jpg http://www.paleoportal.org/media/boilerplate/0/90518_state_x_period_slide_image3_34_image.jpg http://www.paleoportal.org/media/boilerplate/0/11243_state_x_period_slide_image4_34_image.jpg http://www.paleoportal.org/media/boilerplate/0/48977_state_x_period_slide_caption1_34_image.gif http://www.paleoportal.org/media/boilerplate/0/97667_state_x_period_slide_caption2_34_image.gif http://www.paleoportal.org/media/boilerplate/0/97799_state_x_period_slide_caption3_34_image.gif http://www.paleoportal.org/media/boilerplate/0/32835_state_x_period_slide_caption4_34_image.gif October 29, 2003 at 05:46:52 July 21, 2006 at 10:29:03 Resources Courses and Lectures 23 291 http://jan.ucc.nau.edu/~rcb7/paleogeogwus.html The paleogeography of the southwestern U.S. from 1.8 billion years ago to 10 million years ago. Text and images by Dr. Ron Blakey from Northern Arizona University. 0 Resources Field Guides 22 2436 http://inyo.coffeecup.com/site/uw/unionwash.html Visit a famous Early Triassic ammonite locality in the shadows of Mount Whitney; virtual field trip; many images of fossils; paleontology links, plus links to Inyo County. 0 Resources Image Collections 27 2449 http://inyo.coffeecup.com/site/brachiopods/brachiopods.html Images of several fossil brachiopods, dating in geologic age from early Cambrian to Pleistocene, with explanatory text. 0 Resources General Reference 38 2427 http://inyo.coffeecup.com/site/dv/dvfossils.htm The paleontology, geology and natural wonders of Death Valley National Park (and more); many images of fossils; field trips; paleontology links, plus links to Death Valley. 0