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Mesa Grande, Mesa Grande District, San Diego Co., California, USA

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Latitude & Longitude (WGS84): 33° 10' 49'' North , 116° 46' 6'' West
Latitude & Longitude (decimal): 33.1802777778, -116.768333333

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

Mineral List

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

Regional Geology

Cretaceous66 - 145 MaCretaceous plutonic: mafic rocks

Plutonic: mafic rocks

Cretaceous66 - 145 MaCretaceous plutonic rocks

Plutonic rocks

Deep-seated to high-level intrusions are included. Many charnockites, anorthosites, and large ophiolites, classified as plutons, are distinguished in the database using the SIGNIF item. Ophiolites were classified as plutons, even where remnants may be extrusive and/or sedimentary.

Late Cretaceous - Paleoproterozoic66 - 2500 Mapre-Cenozoic granitic and metamorphic rocks undivided

Major:: {plutonic rock (phaneritic)},Minor:: {gneiss},Incidental:: {metasedimentary rock, metavolcanic rock}

Granitic and metamorphic rocks, mostly gneiss and other metamorphic rocks injected by granitic rocks. Mesozoic to Precambrian.

Southern California, Mojave Desert, Sierra Nevada, central California Coast Ranges

References for regional geology:

Data provided by

Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .

USGS compilers. State geologic map data. State Maps.

Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.

13 valid minerals.

Localities in this Region

The above list 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.
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