USGS Visual Identifier

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Geologic Unit: Christmas Canyon

Publication:
Smith, G.I., 1964, Geology and volcanic petrology of the Lava 
   Mountains, San Bernardino County, California: U.S. Geological 
   Survey Professional Paper, 457, 97 p., (incl. geologic map, 
   scale 1:24,000) [Available online from the USGS PubsWarehouse: 
   http://pubs.er.usgs.gov/pubs/pp/pp457]
Usage in Publication:
Christmas Canyon Formation*

Modifications: Geologic Province: Dominant Lithology:
 Named
 Mojave basin
 Sandstone
 Conglomerate

Summary:
Named for Christmas Canyon about 1 mi east of type section which is designated as exposures SW/4 NW/4 sec.8 T28S R43E Lava Mountains, San Bernardino Co, CA. Consists of 2 distinct facies. Sandstone facies occurs in strip about .5 mi wide south of and parallel to Garlock fault; also it occurs north of fault. Boulder conglomerate facies characterized by small percentage of vesicular andesite, basaltic, and rhyolitic boulders 1 to 2 ft across is present both on top of and south of sandstone facies. Thickness is 50 to 500 ft. Conglomerate facies unconformably overlies Bedrock Spring Formation (new). Christmas Canyon Formation is younger than Almond Mountain Volcanics and Lava Mountain Andesite (both new). On basis of fossil hoof bone (whose identity is admittedly inconclusive) and presence of Pleistocene(?) lava bounders, age of Pleistocene(?) is assigned.
Source: GNU records (USGS DDS-6; Menlo GNULEX).


Publication:
Smith, G.E., Troxel, B.W., Gray, C.H., and von Huene, Roland, 
   1968, Geologic reconnaissance of the Slate Range, San Bernardino 
   and Inyo Counties, California: California Division of Mines 
   and Geology Special Report, no. 96, 33 p., (incl. geologic 
   map, scale 1:62,500)
Usage in Publication:
Christmas Canyon Formation*

Modifications: Geologic Province: Dominant Lithology:
 Areal limits
 Mojave basin
 

Summary:
Geographically extended to southern Slate Range, north of Garlock fault. Geologic map of Slate Range describes unit as lake silts and sands of Pleistocene(?) age. Lithology and mineral content of Christmas Canyon Formation both in Slate Range and in Lava Mountains show it was formed in closed basins that were elongate parallel to Garlock fault.
Source: GNU records (USGS DDS-6; Menlo GNULEX).


Publication:
Izett, G.A., and Wilcox, R.E., 1982, Map showing localities and 
   inferred distributions of the Huckleberry Ridge, Mesa Falls, 
   and Lava Creek ash beds (Pearlette family ash beds) of 
   Pleistocene age in the western United States and southern 
   Canada: U.S. Geological Survey Miscellaneous Investigations 
   Series Map, I-1325, 1 sheet, scale 1:4,000,000
Usage in Publication:
Christmas Canyon Formation*

Modifications: Geologic Province: Dominant Lithology:
 Age modified
 Isotopic dating
 Mojave basin
 

Summary:
Zircon fission-track age of 0.57 +/-0.20 Ma (C.W. Naeser, written commun., 1978) was obtained on Lava Creek B ash in Christmas Canyon Formation. Sample collected at SW/4 SW/4 sec.8 T28S R43E, Searles Lake 15' quad, San Bernardino Co, CA. Age therefore is Pleistocene.
Source: GNU records (USGS DDS-6; Menlo GNULEX).