The 200 miles of east-west rock walls of the Grand Canyon are unmatched and invaluable for their record of earth history and for their outstanding geology. With this new volume, this major work by Spamer is now finished, providing geologists with an outstanding reference tool. Contains both alphabetical and chronological listings for all references. An essential companion to this work is Spamer’s Geology of the Grand Canyon: A Guide and Index to Published Graphic and Tabular Data (Excluding Paleontology).