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- Hakatai_Shale abstract "The Hakatai Shale is a Mesoproterozoic rock formation that outcrops in the Grand Canyon, Coconino County, Arizona. It consists of colorful strata that exhibit colors that vary from purple to red to brilliant orange on outcrop. The colors are the result of the oxidation of iron-bearing minerals in the Hakatai Shale. It consists of lower and middle members that consist of bright-red, slope-forming, highly fractured, argillaceous mudstones and shale and an upper member composed of purple and red, cliff-forming, medium-grained sandstone. Its thickness, which apparently increases eastwards, varies form 137 to 300 m (448 to 981 ft). In general, the Hakatai Shale and associated strata of the Unkar Group rocks dip northeast (10°-30°) toward normal faults that dip 60° or more toward the southwest. This can be seen at the Palisades fault in the eastern part of the main Unkar Group outcrop area (below East Rim). In addition, thick, prominent, and dark-colored basaltic sills and dikes cut across the purple to red to brilliant orange strata of the Hakatai Shale.The bright orange-red slopes of the Hakatai Shale contrasts sharply against the grayish outcrops of the Bass Formation. The outcrop of the Hakatai Shale also contrasts greatly with the steep cliffs formed by Shinumo Quartzite as seen at the base of Isis Temple. In the central Grand Canyon north of Grand Canyon Village and viewed from the south at the South Rim, the bright orange-red unit can be seen below the Isis Temple and Cheops Pyramid landforms at the intersection of Bright Angel Canyon and Granite Gorge; the Bright Angel Trail from the South Rim traverses through the geographic region to the north, the North Kaibab Trail in Bright Angel Canyon.The Hakatai Shale is part of a conformable sequence of sedimentary strata that comprise the Unkar Group. The Unkar Group is about 1,600 to 2,200 m (5,200 to 7,200 ft) thick and composed, in ascending order, of the Bass Formation, Hakatai Shale, Shinumo Quartzite, Dox Formation, and Cardenas Basalt. In ascending order, the Unkar Group is overlain by the Nankoweap Formation, about 113 to 150 m (371 to 490 ft) thick; the Chuar Group, about 1,900 m (6,200 ft) thick; and the Sixtymile Formation, about 60 m (200 ft) thick. The Grand Canyon Supergroup, of which the Unkar Group is the lowermost part, overlies deeply eroded granites, gneisses, pegmatites, and schists that comprise Vishnu Basement Rocks.".
- Hakatai_Shale thumbnail Grand_Canyon_with_Snow_4.JPG?width=300.
- Hakatai_Shale wikiPageExternalLink hakatai.htm.
- Hakatai_Shale wikiPageExternalLink unit_8303.html.
- Hakatai_Shale wikiPageExternalLink proddesc_20120.htm.
- Hakatai_Shale wikiPageExternalLink ngmdb_home.html.
- Hakatai_Shale wikiPageExternalLink supergroup.html.
- Hakatai_Shale wikiPageExternalLink 12-1.pdf.
- Hakatai_Shale wikiPageExternalLink geology_manual.htm.
- Hakatai_Shale wikiPageExternalLink hakatai_shale.shtml.
- Hakatai_Shale wikiPageExternalLink supergroup_formations.shtml.
- Hakatai_Shale wikiPageExternalLink stromatolites_in_the_hakatai.
- Hakatai_Shale wikiPageExternalLink index.cfm.
- Hakatai_Shale wikiPageID "37284146".
- Hakatai_Shale wikiPageRevisionID "594825629".
- Hakatai_Shale age "Meso-Proterozoic, 1,200±50 Ma?".
- Hakatai_Shale caption "Three approximate equal-thickness formations outcropping below Isis Temple at north perimeter, Granite Gorge".
- Hakatai_Shale caption "Unkar Group, Shinumo Quartzite , upon basalt sills, upon orange-red Hakatai Shale, upon Bass Formation.".
- Hakatai_Shale country Southwestern_United_States.
- Hakatai_Shale hasPhotoCollection Hakatai_Shale.
- Hakatai_Shale imagesize "265".
- Hakatai_Shale namedby "Noble".
- Hakatai_Shale namedfor "Hakatai Canyon".
- Hakatai_Shale otherlithology "siltstone, sandy siltstone, and sandstone".
- Hakatai_Shale overlies Bass_Formation.
- Hakatai_Shale period "Mesoproterozoic".
- Hakatai_Shale prilithology Shale.
- Hakatai_Shale region "Arizona, Grand Canyon".
- Hakatai_Shale region "Isis Temple region, southwest Bright Angel Canyon, at north side, Granite Gorge, and along Colorado River".
- Hakatai_Shale thickness "approximate maximum".
- Hakatai_Shale type Formation_(stratigraphy).
- Hakatai_Shale underlies Shinumo_Quartzite.
- Hakatai_Shale unitof Unkar_Group.
- Hakatai_Shale subject Category:Geologic_formations_of_the_United_States.
- Hakatai_Shale subject Category:Geology_of_Arizona.
- Hakatai_Shale subject Category:Grand_Canyon.
- Hakatai_Shale comment "The Hakatai Shale is a Mesoproterozoic rock formation that outcrops in the Grand Canyon, Coconino County, Arizona. It consists of colorful strata that exhibit colors that vary from purple to red to brilliant orange on outcrop. The colors are the result of the oxidation of iron-bearing minerals in the Hakatai Shale.".
- Hakatai_Shale label "Hakatai Shale".
- Hakatai_Shale sameAs m.0n5vd3z.
- Hakatai_Shale sameAs Q5640352.
- Hakatai_Shale sameAs Q5640352.
- Hakatai_Shale wasDerivedFrom Hakatai_Shale?oldid=594825629.
- Hakatai_Shale depiction Grand_Canyon_with_Snow_4.JPG.
- Hakatai_Shale isPrimaryTopicOf Hakatai_Shale.
