Kramer Hills deposit (Unnamed Magnesite deposit ), Kramer Hills [hills], Kramer Hills [town], East Kramer Borate area (East Kramer Colemanite area), East Kramer District, San Bernardino Co., California, USA
|Latitude & Longitude (WGS84):||34° 54' 9'' North , 117° 30' 27'' West|
|Latitude & Longitude (decimal):||34.90246,-117.50748|
|Köppen climate type:||BSk : Cold semi-arid (steppe) climate|
A magnesite deposit/prospects located in secs. 3 & 4, T9N, R6W, SBM, 4.1 km (2.5 miles) WSW of Kramer Hills (town), and about 9.3 km (6 miles) SSE of Kramer Junction, along the western margins of the central Kramer Hills (hills), on Bureau of Land Management administered land. MRDS database stated accuracy for this location is 1,000 meters. There are several prospect symbols on the topo map in the NW¼ sec. 3, NE¼ sec. 4 & in the N½SE¼ sec. 4.
NOTE: The geographic coordinates provided are for the center of the boundary line between sections 3 & 4. USGS MRDS database file #10237802 presents geographic coordinates of 34.9066666667, -117.5, which corresponds to the prospect symbol in the NW¼ of sec. 3.
NOTE: The description for the location of this deposit in the reference is about 4 miles SE of Kramer Station. There is no such locality name listed in the USGS GNIS database (primary or alternate). Research of the coordinates for the stated T&R location indicates that has to be referring to Kramer Junction, which is the local population center on the railroad.
Local rocks include Mesozoic volcanic rocks, unit 3 (Mojave Desert, Death Valley area, and Eastern Sierra Nevada).
Workings include unspecified surface workings (MRDS file).
1 valid mineral.
Rock Types Recorded
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Entries shown in red are rocks recorded for this region.
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
|Zanclean - Aquitanian|
3.6 - 23.03 Ma
|Tertiary volcanic flow rocks, unit 16 (Northern Mojave Desert)|
Age: Neogene (3.6 - 23.03 Ma)
Stratigraphic Name: Alvord Peak Basalt; Artist Drive Formation; Barstow Formation (part); Funeral Fanglomerate (part); Gem Hill Formation (part); Greenwater Volcanics; Red Buttes Quartz Basalt; Ricardo Formation (part); Saddleback Basalt; Tropico Group
Description: Tertiary volcanic flow rocks; minor pyroclastic deposits.
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. 
Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology, California Division of Mines (Report 49): 49(1-2): 184.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 249.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10237802.
U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060710468.