Arizona Geology Blog: Grand Canyon Stratigraphy — A Fresh Holistic Approach
by Bob Leighty (Mesa Community College)
On September 9, 2021, AZGS released Bob Leighty’s magnificent and informative Grand Canyon Stratigraphy — A Fresh Holistic Approach. It includes the usual strat column features: geologic time, lithologies and rock units. The Lithologies section boasts nearly 40 radiogenic age dates tracking the temporal evolution of strata exposed in Grand Canyon. Also included, a rich suite of symbols representing key sedimentary features and structures: fossils, mud cracks, cross bedding, convoluted bedding, to name a few.
Other useful features: Canyon Etymology, Tectonic History, a dozen photos of representative Grand Canyon rock units, and major hydrologic features. The full sized poster measures 24 x 54 inches.
View/download the publication at AZGS Document Repository »
A Spanish translation is available, courtesy of AZGS’ Victor Higareda Garcia.