Hermit Formation
Hermit Formation | |
---|---|
Ma | |
Type | Geological formation |
Underlies | Coconino Sandstone |
Overlies | Supai Group |
Thickness | 900 feet (270 m), at maximum |
Lithology | |
Primary | siltstone and mudstone |
Other | sandstone |
Location | |
Region | Arizona-(North & Central Arizona) California-(southeast) and Utah-(southern) |
Country | United States-(Southwestern United States) |
Type section | |
Named for | Hermit basin, Coconino County, Arizona[3] |
Named by | Noble (1923)[3] |
Wikimedia Commons has media related to Hermit Formation.
The
paleochannels that are quite common in this formation. The siltstone beds often contain poorly preserved plant fossils. The Hermit Formation varies in thickness from about 100 feet (30 m) in the eastern part of the Grand Canyon region to about 900 feet (270 m) in the region of Toroweap and Shivwits Plateaus. In the Sedona, Arizona
area, it averages 300 feet (91 m) in thickness. The upper contact of the Hermit Formation is typically sharp and lacks
gradation of any kind. The lower contact is a relief, including paleovalleys as much as 60 feet (18 m) deep.[1]
See also
References
- ^ a b Blakey, RC (2003) Supai Group and Hermit Formation in: Beus, S.S., Morales, M., eds., pp. 136–162, Grand Canyon Geology, 2nd. Oxford University Press, New York.
- ^ Anonymous (2006i) Hermit Formation. Stratigraphy of the Parks of the Colorado Plateau. U.S. Geological Survey, Reston, Virginia.
- ^ Wikidata Q61049649.
Popular Publications
- Blakey, Ron and Wayne Ranney, Ancient Landscapes of the Colorado Plateau, Grand Canyon Association (publisher), 2008, 176 pages, ISBN 978-1934656037
- Chronic, Halka. Roadside Geology of Arizona, Mountain Press Publishing Co., 1983, 23rd printing, pp. 229–232, ISBN 978-0-87842-147-3
- Lucchitta, Ivo, Hiking Arizona's Geology, 2001, Mountaineers's Books, ISBN 0-89886-730-4
External links
- Mathis, A., and C. Bowman (2007) The Grand Age of Rocks: The Numeric Ages for Rocks Exposed within Grand Canyon, Grand Canyon National Park, Arizona, National Park Service, Grand Canyon National Park, Arizona.
- Shur, C., and D. Shur (2008) The Hermit Formation In Northern Arizona. Arizona Fossil Adventures.