Guide to Identifying Clast/Rock Types in Some Major Streams of Southern Arizona

This guide provides images, names, and descriptions of most of the major clast/rock types that can be found within the stream and basin deposits of southern Arizona. It is intended to be a basic tool to help identify clasts and to provide a common frame of reference when discussing these clasts. The guide is organized into four sections where each successive section builds on the previous ones to help identify clasts.