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Cottonwood Canyon, Tyndall District, Santa Rita Mts, Santa Cruz Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 38' 38'' North , 111° 2' 1'' West
Latitude & Longitude (decimal): 31.64389,-111.03361
Other regions containing this locality:Sonoran Desert, North America
Köppen climate type:BSk : Cold semi-arid (steppe) climate


‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 187-188.

This canyon lies 1¼ miles south of Montosa Canyon, and heads in the upper southeast slope of Mount Hopkins.

The deposits here lie southeast of the montosa deposits, to which their copper-stained croppings are said to be almost continuously traceable.

The country rock here seems to be porincipally diorite underlain by limestone, which it intrudes, and capped by andesite.

Mineral List

Mineral list contains entries from the region specified including sub-localities

32 valid minerals.

Regional Geology

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

Middle Pleistocene - Piacenzian
0.126 - 3.6 Ma



ID: 2779594
Early Pleistocene to latest Pliocene surficial deposits

Age: Cenozoic (0.126 - 3.6 Ma)

Description: Coarse relict alluvial fan deposits that form rounded ridges or flat, isolated surfaces that are moderately to deeply incised by streams. These deposits are generally topographically high and have undergone substantial erosion. Deposits are moderately to strongly consolidated, and commonly contain coarser grained sediment than younger deposits in the same area. (0.75-3 Ma)

Lithology: Major:{gravel,sand}

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. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


Localities in this Region


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