Grand Staircase
Guests: Doug Sharp and Rich Geer
Description: GEOLOGY OF THE COLORADO PLATEAU
Cedar Breaks National Monument – topmost layer
Entrada Sandston in Bryce Canyon National Park
White Cliffs in Zion National Park
Grand Staircase National Monument
Vermillion Cliffs National Monument
Chocolate Cliffs on the North Rim Grand Canyon
Kaibab
Toroweap
Coconino
Hermit Shale
Supai Group
Redwall Limestone – Mississippian
UNCONFORMITY – INTERBEDDING
Temple Butte – Devonian
Muav – Cambrian
Bright Angel Shale
Tapeats Sandstone
GREAT UNCONFORMITY – PRECAMBRIAN
Dox Formation
Shinumo Sandstone
Hakatai Shale
Diabase
Vishnu Schist
Zoroaster Granite
Brahma Schist
Rama Schist
Elve’s Canyon Gneiss
EVIDENCE FOR RESURFACING OF THE EARTH
The cliffs at Page and Lee’s Ferry form a funnel into the Grand Canyon.
The side canyons of the Grand Canyon point toward the east.
Crossbedding in all layers show rapid deposition
Hoodoos in Bryce, Cedar Breaks and elsewhere
Painted Desert is at lower elevation