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Ambrosia Lake Sub-district, Grants District, McKinley Co., New Mexico, USA

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Latitude & Longitude (WGS84): 35° 24' 54'' North , 107° 49' 29'' West
Latitude & Longitude (decimal): 35.41505,-107.82482
Köppen climate type:BSk : Cold semi-arid (steppe) climate

A U-V-Mo-Se mining sub-district located in townships 11, 12, 13 & 14N and ranges 8, 9, 10 & 11W. The mines in townships 11 & 12 are in Cibola County.

The location given is for the Section 30 Mine, which has the largest reported U production in the sub-district.

Mineral List

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

63 valid minerals. 2 (TL) - type locality of valid minerals.

Rock Types Recorded

Note: this is a very new system on and data is currently VERY limited. Please bear with us while we work towards adding this information!

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

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Alphabetical List Tree Diagram

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

Turonian - Cenomanian
89.8 - 100.5 Ma

ID: 2722886
Mancos Shale, lower part

Age: Late Cretaceous (89.8 - 100.5 Ma)

Stratigraphic Name: Mancos Shale

Lithology: Major:{shale,limestone}

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, used under Creative Commons Attribution 4.0 License

Localities in this Region

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Trauger, F. D., Editor (1967), New Mexico Geological Society Guidebook, 18th. Field Conference, 228 pp.
Hilpert, Lowell S. (1969), Uranium Resources of northwestern New Mexico, USGS Professional Paper 603, 166 pp.
Holmquist, R. J. (1970), U.S. Atomic Energy Commission RME-172.
Schilling, F. A. (1975), New Mexico Bureau of Mines and Mineral Resources, Bulletin 105, 69 pp.
Fasset, J. E., and James, H. L., Editors (1977), New Mexico Geological Society, Guidebook, 28th. Field Conference, 319 pp.
Perkins, B. L. (1979), An Overview of the New Mexico Uranium Industry, New Mexico Energy and Minerals Department Report.
Anderson, O. J. (1980), New Mexico Bureau of Mines and Mineral Resources, Open File Report OFR-148.
New Mexico Energy and Minerals Report (1980), Uranium Resources and Technology.
Rautman, C. A., Comp. (1980), New Mexico Bureau of Mines and Mineral Resources, Memorandum 38, 400 p.
McLemore, Virginia T. (1983), New Mexico Bureau of Mines and Mineral Resources, Open File Report OFR-183.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #60000397.

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