Gravel Hills, San Bernardino Co., California, USA

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Latitude & Longitude (WGS84):	35° 11' 25'' North , 117° 20' 37'' West
Latitude & Longitude (decimal):	35.1902486, -117.3436625

A range.

NOTE: Two sets of geographic coordinates are presented in the USGS GNIS database. The set presented here are from the Bird Spring topo map.

Mineral List

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

ⓘ Microcline

1 valid mineral.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on mindat.org 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

Sedimentary rock and sediment
- Sediment and sedimentary rock based on grain or crystal size
  - Clastic-sediment
    - Mud
      - ⓘ Clay

Regional Geology

This 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 data will improve over time as more accurate maps and data sets are added.

Pleistocene - Oligocene0.0117 - 33.9 Ma

Miocene nonmarine rocks

Major:: {sandstone},Minor:: {conglomerate},Incidental:: {siltstone, mudstone, sedimentary breccia, limestone, dolostone (dolomite), chert, felsic volcanic rock (aphanitic), basalt}

Sandstone, shale, conglomerate, and fanglomerate; in part Pliocene and Oligocene.

Neogene2.588 - 23.03 Ma

Neogene sedimentary

Sedimentary

Cretaceous66 - 145 Ma

Cretaceous 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.

References for regional geology:

Data provided by Macrostrat.org

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.

Localities in this Region

USA

California
- San Bernardino Co.
  - Gravel Hills
    - Bird Spring

The above list contains all mineral locality references listed on mindat.org. 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 mindat.org 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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