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Gleeson, Turquoise District (Courtland-Gleeson District), Dragoon Mts, Cochise Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 44' 2'' North , 109° 49' 45'' West
Latitude & Longitude (decimal): 31.73389,-109.82917
Other regions containing this locality:Sonoran Desert, North America
Köppen climate type:BSk : Cold semi-arid (steppe) climate


No description has been added for this locality. Can you add one?

Mindat Articles

Gleeson Arizona Mines by Rolf Luetcke
The George Turquoise Mine by Dave and Karen Stryker




Mineral List

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

38 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

Tithonian - Toarcian
145 - 182.7 Ma



ID: 3022286
Jurassic granitic rocks

Age: Jurassic (145 - 182.7 Ma)

Description: Granite to diorite, locally foliated and locally alkalic; includes Triassic(?) granitoids in the Trigo Mountains. This unit includes two dominant assemblages of igneous rocks. The Kitt Peak-Trigo Peaks superunit includes, from oldest to youngest: dark, foliated or gneissic diorite, medium-grained equigranular to porphyritic granodiorite, and small, irregular intrusions of light-colored, fine-grained granite. The Ko Vaya superunit, limited to south-central Arizona, includes texturally heterogeneous K-feldspar-rich granitic rocks. (150-180 Ma)

Lithology: Major:{diorite,alkali granite,granodiorite}

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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