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2. Geology of the Grand Canyon area - Wikipedia

   en.wikipedia.org/wiki/Geology_of_the_Grand...

   Grand Canyon lies on the southern end of the Intermountain West seismic belt. [84] At least 35 earthquakes larger than 3.0 on the Richter Scale occurred in the Grand Canyon region in the 20th century. [85] Of these, five registered over 5.0 on the Richter Scale and the largest was a 6.2 quake that occurred in January 1906. [85]

3. Sixtymile Formation - Wikipedia

   en.wikipedia.org/wiki/Sixtymile_Formation

   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 978-0878421473

4. Grand Canyon National Park - Wikipedia

   en.wikipedia.org/wiki/Grand_Canyon_National_Park

   Location: Coconino and Mohave counties, Arizona, United States: Nearest city: Fredonia, Arizona (North Rim) Tusayan, Arizona (South Rim): Coordinates: 2]: Area: 1,217,262 acres (4,926.08 km 2) [3]: Established: January 11, 1908 () as a national monument February 26, 1919 () as a national park: Visitors: 4,733,705 (in 2023) [4]: Governing body: National Park Service: Website: nps.gov /grca ...

5. Toroweap Overlook - Wikipedia

   en.wikipedia.org/wiki/Toroweap_Overlook

   Toroweap Overlook (also known as Tuweep Overlook or Toroweap Point) is a viewpoint within the Grand Canyon National Park in Arizona, United States. It is located in a remote area on the North Rim of the Grand Canyon , 55 miles (89 km) west of the North Rim Headquarters (but 148 miles (238 km) by road).

6. Tonto Group - Wikipedia

   en.wikipedia.org/wiki/Tonto_Group

   Figure 1. A geologic cross section of the Grand Canyon. [5]The Tonto Group is a name for an assemblage of related sedimentary strata, collectively known by geologists as a Group, that comprises the basal sequence Paleozoic strata exposed in the sides of the Grand Canyon.

7. Frenchman Mountain Dolostone - Wikipedia

   en.wikipedia.org/wiki/Frenchman_Mountain_Dolostone

   East of the Grand Wash fault and in the Grand Canyon region, its thickness decreases abruptly to 52 m (171 ft) at Quartermaster Canyon, 106 m (348 ft) at 269-Mile Canyon, and 70 m (230 ft) near Diamond Bar Ranch. Further eastward in the Grand Canyon region, the thickness of the Frenchman Mountain Dolostone gradually decreases to 52 m (171 ft ...