Wood Chop Mesa, Bidahochi, Hopi Buttes Mining District, Navajo Co., Arizona, USAi
|Regional Level Types|
|Wood Chop Mesa||Mesa|
|Hopi Buttes Mining District||Mining District|
A summit located 5.8 km (3.6 miles) NE of Bidahochi and 7.6 km (4.8 miles) NE of Indian Wells.
Regions containing this locality
|North America Plate||Tectonic Plate|
|Colorado Plateau, USA||Plateau|
|Navajo Nation Indian Reservation, USA||Reservation|
|Hopi-Navajo Indian Reservations, Colorado Plateau, Apache; Navajo and San Juan Cos., Arizona & Utah, USA|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded from this region.
Mineral ListMineral list contains entries from the region specified including sub-localities
1 valid mineral.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
Detailed Mineral List:
| ⓘ Autunite|
Formula: Ca(UO2)2(PO4)2 · 11H2O
Locality: Gwen prospect, Wood Chop Mesa, Bidahochi, Hopi Buttes Mining District, Navajo Co., Arizona, USA
Reference: Scarborough, Robert B. (1981), Radioactive occurrences and uranium production in Arizona – Final Report, Arizona Bureau of Geology and Mineral Technology Report for U.S. Department of Energy (Atomic Energy Commission), GJBX-143 (81) (March 1981). RME-2071: 220.
| ⓘ 'Phillipsite'|
Habit: Fiveling-twinned crystals.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 326.
List of minerals arranged by Strunz 10th Edition classification
|Group 8 - Phosphates, Arsenates and Vanadates|
|ⓘ||Autunite||8.EB.05||Ca(UO2)2(PO4)2 · 11H2O|
|Unclassified Minerals, Rocks, etc.|
List of minerals arranged by Dana 8th Edition classification
|Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES|
|AB2(XO4)2·xH2O, containing (UO2)2+|
|ⓘ||Autunite||40.2a.1.1||Ca(UO2)2(PO4)2 · 11H2O|
|Unclassified Minerals, Mixtures, etc.|
List of minerals for each chemical element
|H||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
|O||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
|P||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
|Ca||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
|U||ⓘ Autunite||Ca(UO2)2(PO4)2 · 11H2O|
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
0 - 0.0117 Ma
|Eolian sand-sheet deposits|
Age: Anthropocene (0 - 0.0117 Ma)
Description: Extensive sand-sheet deposits northeast and east of Little Colorado River Valley, especially in and along large tributary washes and over gently sloping terrain below Newberry, Ives, and Marcou Mesas. Forms thin sand-sheet deposits on alluvial fan slopes of various ages and on “Dilkon deposits” (QTdi) slopes in Hopi Buttes area. Commonly intertongues with surficial deposits (Qae, Qdp, Qdb); contacts are gradational in both lateral and vertical sense. Supports moderate growths of grass and small high-desert shrubs that help stabilize or trap accumulating deposits. Thickness, 0.3 to 4.5 m (1 to 15 ft)
Reference: Billingsley, G.H., D. Block, and M. Hiza Redsteer. Geologic map of the Winslow 30’ × 60’ quadrangle, Coconino and Navajo Counties, northern Arizona. U.S. Geological Survey Scientific Investigations Map 3247. 
2.588 - 5.333 Ma
|Cenozoic sedimentary rocks|
Age: Pliocene (2.588 - 5.333 Ma)
Lithology: Sedimentary rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
|Zanclean - Tortonian|
3.6 - 11.62 Ma
|Pliocene to late Miocene basaltic rocks|
Age: Neogene (3.6 - 11.62 Ma)
Description: Mostly dark, inconspicuously flat, low-lying or mesa-forming basalt deposited as lava flows. Rocks included in this unit are located almost entirely in the large volcanic fields south and west of Flagstaff, in smaller fields in northwesternmost Arizona, and in the Hopi Buttes volcanic field on the Navajo and Hopi Indian Reservations north of Holbrook. Original volcanic landforms have been obscured by erosion. (4-8 Ma)
Comments: Chiefly Hopi Buttes, "Rim basalts", volcanic fields in northwesternmost Arizona Original map source: Arizona Geological Survey, DI-8 Geologic Map of Arizona, Digital Spatial data for the Geologic Map of Arizona, v. 3.0, edited by S.M. Richard and S.M. Kneale, 2002, 10 p., 2 DOS HD disks. Arc/INFO export file (.e00) format, scale 1:1,000,000.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.