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Juaro Canyon Quarry, Soboba Hot Springs (Ritchey Hot Springs; White Sulphur Spring), San Jacinto Mts, Riverside Co., California, USA

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Latitude & Longitude (WGS84): 33° 48' 7'' North , 116° 54' 32'' West
Latitude & Longitude (decimal): 33.8019447327, -116.908889771

A former stone (crushed/broken) deposit/quarry located in the SW¼SW¼SW¼ sec. 20, T4S, R1E, SBM, 1.9 km (1.2 miles) E of Soboba Hot Springs, along Juaro Canyon, on Indian reservation land (Soboba Indian Reservation). Owned & operated by D. J. B. Properties (100%), California (1990). MRDS database stated accuracy for this location is 100 meters.

Local rocks include Plio-Pleistocene and Pliocene loosely consolidated deposits.

Workings include unspecified surface openings (the topo map reflects 1 quarry symbol labeled "quarry" at this point).

Mineral List

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

Pleistocene - Miocene
0.0117 - 23.03 Ma
Plio-Pleistocene and Pliocene loosely consolidated deposits

Age: Cenozoic (0.0117 - 23.03 Ma)

Stratigraphic Name: Arroyo Seco Gravel; Cache Formation; Carlotta Formation; China Hat Gravel; China Ranch Beds; Coso Formation; Funeral Fanglomerate (part); Furnace Creek Formation; Glen Ellen Formation; Irvington Gravels; Kern River Formation; Laguna Formation; Livermore Gravel; McKittrick Formation; North Merced Gravel; Nova Formation; Packwood Gravels; Paso Robles Formation; Red Bluff Formation; Ricardo Formation; San Benito Gravels; Santa Clara Formation; Saugus Formation; Tehachapi Formation; Tulare Formation; Turlock Lake Formation; Alturas Formation; Anaverde Formation; Canebrake Conglomerate; Chanac Formation; Crowder Formation; Duarte Conglomerate; Esmeralda Formation; Etchegoin Formation; Green Valley Formation; Hathaway Formation; Horned Toad Formation; Hungry Valley Formation; Lockwood Clay; Mecca Formation; Meeke Mine Formation; Mehrten Formation; Morales Formation; Mount Eden Formation; Mulholland Formation; Neroly Formation; Orinda Formation; Oro Loma Formation; Painted Hill Formation; Palm Spring Formation; Panorama Hills Formation; Peace Valley Formation; Petaluma Formation; Potato Sandstone; Purisima Formation; Quatal Formation; Ricardo Formation (part); Ridge Route Formation; Santa Ana Sandstone; San Timoteo Formation; Siesta Formation; Tassajero Formation; Tehama Formation; Tropico Group; Wolfskill Formation

Description: Pliocene and/or Pleistocene sandstone, shale, and gravel deposits; in part Miocene.

Lithology: Major:{sandstone,conglomerate}, Minor:{siltstone,mudstone}, Incidental:{limestone, evaporite, coal, sedimentary breccia}

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

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.


California Division of Mines and Geology Open-File Report 77-14 (1977): tabulated list, No. 402, p. 277.

California Division of Mines and Geology (1990), Mines and mineral producers active in California (1988-89), California Department of Conservation, Division of Mines and Geology, Special Publication 103.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10188914.

U.S. Bureau of Mines Minerals Availability System/Mineral Industry Location System (MAS/MILS): file #0060650054.

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