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- Dox_Formation abstract "The Dox Formation, also known as the Dox Sandstone, is a Mesoproterozoic rock formation that outcrops in the eastern Grand Canyon, Coconino County, Arizona. The strata of the Dox Formation, except for some more resistant sandstone beds, are relatively susceptible to erosion and weathering. The lower member of the Dox Formation consists of silty-sandstone and sandstone, and some interbedded argillaceous beds, that form stair-stepped, cliff-slope topography. The bulk of the Dox Formation typically forms rounded and sloping hill topography that occupies an unusually broad section of the canyon.The Dox Formation comprises the bulk of the Unkar Group, the base section of the Grand Canyon Supergroup. The Unkar Group is about 1,600 to 2,200 m (5,200 ft to 7,200 ft) thick and composed of, in ascending order, the Bass Formation, Hakatai Shale, Shinumo Quartzite, Dox Formation, and Cardenas Basalt. The Unkar Group is overlain in ascending order 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 entire Grand Canyon Supergroup overlies deeply eroded granites, gneisses, pegmatites, and schists that comprise Vishnu Basement Rocks.In general, the Dox Formation and associated strata of the Unkar Group rocks dip northeast (10°-30°) toward normal faults that dip 60+° 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). Within the central Grand Canyon, these strata occur in small, rotated, downfaulted blocks or slivers where they commonly are only partially exposed. Within this part of the Grand Canyon, the Unkar Group is incomplete because pre-Tapeats Sandstone erosion has removed strata above the level of the middle part of the Dox Formation. The missing part of the Dox Formation and overlying Cardenas Basalt and Chuar Group are preserved in a prominent syncline and fault block that is exposed in the eastern Grand Canyon. The Dox Formation contains thick basaltic sills and a number of small, dark dikes. In the area of Desert View and west of Palisades of the Desert, the basaltic sills form very prominent, dark gray cliffs.The Dox Formation takes its name from frontier educator Virginia Dox, the first white woman to explore the Grand Canyon, for whom the Dox Castle butte was named.".
- Dox_Formation thumbnail Comanche_Point,_on_the_South_Rim_of_the_Grand_Canyon.jpg?width=300.
- Dox_Formation wikiPageExternalLink dox.htm.
- Dox_Formation wikiPageExternalLink unkar_group.htm.
- Dox_Formation wikiPageExternalLink cnw00068.htm.
- Dox_Formation wikiPageExternalLink unit_7978.html.
- Dox_Formation wikiPageExternalLink terrestrial%20volcanism.pdf.
- Dox_Formation wikiPageExternalLink supergroup.html.
- Dox_Formation wikiPageExternalLink 12-1.pdf.
- Dox_Formation wikiPageExternalLink geology_manual.htm.
- Dox_Formation wikiPageExternalLink dox_formation.shtml.
- Dox_Formation wikiPageExternalLink supergroup_formations.shtml.
- Dox_Formation wikiPageExternalLink index.cfm.
- Dox_Formation wikiPageID "38405996".
- Dox_Formation wikiPageRevisionID "594842652".
- Dox_Formation age "Meso-Proterozoic, between 1,140 and 1,104 Ma".
- Dox_Formation caption "Dox Formation at Tanner Graben- and upstream on Colorado River".
- Dox_Formation country Southwestern_United_States.
- Dox_Formation hasPhotoCollection Dox_Formation.
- Dox_Formation imagesize "285".
- Dox_Formation namedby "Noble".
- Dox_Formation namedfor "Dox Castle, north side of Colorado River, Shinumo quadrangle, Coconino County, Arizona.".
- Dox_Formation otherlithology Mudstone.
- Dox_Formation overlies Shinumo_Quartzite.
- Dox_Formation period "Mesoproterozoic".
- Dox_Formation prilithology Sandstone.
- Dox_Formation region "Arizona, Grand Canyon".
- Dox_Formation region "Isis Temple region, southwest Bright Angel Canyon, at north side, Granite Gorge, and along Colorado River".
- Dox_Formation subunits "Escalante Creek Member, Solomon Temple Member, Comanche Point Member, and Ochoa Point Member".
- Dox_Formation thickness "to".
- Dox_Formation type Formation_(stratigraphy).
- Dox_Formation underlies Cardenas_Basalt.
- Dox_Formation unitof Unkar_Group.
- Dox_Formation subject Category:Geologic_formations_of_the_United_States.
- Dox_Formation subject Category:Geology_of_Arizona.
- Dox_Formation subject Category:Grand_Canyon.
- Dox_Formation comment "The Dox Formation, also known as the Dox Sandstone, is a Mesoproterozoic rock formation that outcrops in the eastern Grand Canyon, Coconino County, Arizona. The strata of the Dox Formation, except for some more resistant sandstone beds, are relatively susceptible to erosion and weathering. The lower member of the Dox Formation consists of silty-sandstone and sandstone, and some interbedded argillaceous beds, that form stair-stepped, cliff-slope topography.".
- Dox_Formation label "Dox Formation".
- Dox_Formation sameAs m.0qkww3n.
- Dox_Formation sameAs Q5303676.
- Dox_Formation sameAs Q5303676.
- Dox_Formation wasDerivedFrom Dox_Formation?oldid=594842652.
- Dox_Formation depiction Comanche_Point,_on_the_South_Rim_of_the_Grand_Canyon.jpg.
- Dox_Formation isPrimaryTopicOf Dox_Formation.