Sixtymile Formation
The Sixtymile Formation is the uppermost unit of the Grand Canyon Supergroup. It is a very thin accumulation of sandstone, siltstone, and breccia that is exposed in only four places in the Chuar Valley. These exposures occur atop Nankoweap Butte and within Awatubi and Sixtymile Canyons in the eastern Grand Canyon, Arizona. The maximum preserved thickness of the Sixtymile Formation is about 60 meters (200 ft). The actual depositional thickness of the Sixtymile Formation is unknown owing to erosion during the formation of the Great Unconformity and prior to deposition of the Tapeats Sandstone.
primaryTopic
Sixtymile Formation
The Sixtymile Formation is the uppermost unit of the Grand Canyon Supergroup. It is a very thin accumulation of sandstone, siltstone, and breccia that is exposed in only four places in the Chuar Valley. These exposures occur atop Nankoweap Butte and within Awatubi and Sixtymile Canyons in the eastern Grand Canyon, Arizona. The maximum preserved thickness of the Sixtymile Formation is about 60 meters (200 ft). The actual depositional thickness of the Sixtymile Formation is unknown owing to erosion during the formation of the Great Unconformity and prior to deposition of the Tapeats Sandstone.
has abstract
The Sixtymile Formation is the ...... e the Grand Canyon Supergroup.
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Link from a Wikipage to an external page
Wikipage page ID
40,619,869
Wikipage revision ID
729,364,380
age
NeoProterozoic, less than 742 Ma
Caption
Sixtymile Formation in Grand Canyon
country
namedby
Ford et al. , Ford and Breed , and Elston
otherlithology
intraformational breccia
period
NeoProterozoic
prilithology
siltstone and sandstone
region
The Chuar syncline, Grand Canyon, northern Arizona.
Thickness
underlies
Tonto Group separated by Great Unconformity
subject
hypernym
type
comment
The Sixtymile Formation is the ...... tion of the Tapeats Sandstone.
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label
Sixtymile Formation
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