Sedimentology and paleontology of the Upper Triassic Chinle Formation, Bedrock, Colorado

Describes a reddish-brown sandstone, siltstone, and mudstone, with minor amounts of siliciclastic-, carbonate-, and chert-pebble conglomerate, and green mudstone. Deposition occurred in continental environments. Lithofacies, trace fossils, and invertebrate and vertebrate fossils indicate that the Late Triassic climate was tropical monsoonal until the close of Chinle deposition when drier seasons became more pronounced. -from Authors