The Division of Vertebrate Paleontology has mounted expeditions to the southern deserts of Utah for the 2001, 2002, 2003 and 2004 field seasons in search of fossil vertebrates in rocks of Triassic age (ca. 248 to 206 million years BP). In this picture, rocks of the Chinle Formation, the most promising area to look for fossil vertebrate remains, form the slopes and the valleys of the canyons. The reddish cliff-forming rocks at the top belong to the Wingate Formation, which typically does not contain fossils.