The Grand Canyon of the Colorado River, Arizona is one of the geological wonders of the world. The rocks record much of the history of the area during the Archean and Proterozoic Eons as well as the Paleozoic Era. The linear canyon in the center of this photo is the trace of the Bright Angel Fault. The deepest part of the canyon, known as Granite Gorge, displays granites and schists of Archean age. Proterozoic strata of the Grand Canyon Series are not visible in this image.
Paleozoic strata start at the top of Granite Gorge and continue to the top of the canyon.
They represent several marine transgressions and regressions that swept over the coastal regions of the world during the Paleozoic.