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Southern California Areal Mapping Project

 

Geologic Framework of the San Bernardino National Forest

| Selected References | Find geologic maps & digital data |

Location of the San Bernardino National Forest study area
Location of the San Bernardino National Forest study area. Click to enlarge.

SCAMP is conducting geologic mapping in the San Bernardino National Forest (San Bernardino, San Gabriel, and San Jacinto Mountains) in support of a Forest-wide Geographic Information System (GIS) maintained by the U.S. Forest Service. SCAMP mapping will provide a 1:24,000-scale geologic base for the GIS. This mapping also will benefit SCAMP's long-term goal of determining the structural setting and geologic evolution of crystalline and sedimentary rocks in the San Bernardino, San Jacinto, and eastern San Gabriel Mountains. Initial Forest Service priorities concerned carbonate rocks that occur in the north-central San Bernardino Mountains.
These rocks are being mined by a number of companies both for lime-specialty products and for cement. SCAMP mapping (Matti and others, 1993; Miller and others, 1998) has been used by the Forest as a guide to differentiating economic from non-economic carbonate rocks. In addition, the carbonate rocks are host to endemic and endangered plant species that prefer some types of carbonate rocks to others as substrates, and SCAMP mapping will facilitate biogeographic studies in support of plant-management activities.
Additional earth-science priorities identified by the Forest Service to-date include sand-and-gravel deposits for possible development as resources, and landslides that impact Forest infrastructure.
The FY 2000 SCAMP work plan responds to priorities identified by the San Bernardino National Forest:
  • In the southeastern San Gabriel Mountains and vicinity, we plan to complete and release digital versions of the San Antonio Canyon, Mt. Baldy, Telegraph Peak, and Cajon 7.5' quadrangles.
  • In the San Bernardino Mountains, we plan to complete and release the Lake Arrowhead, Fifteenmile Valley, and Butler Peak 7.5' quadrangles.

Recent SCAMP Products

Calzia, J.P., Matti, J.C., and Gantenbein, Michael, 1995, Geology, geochemistry, and resource potential of carbonate rocks in the San Bernardino National Forest, California: U. S. Geological Survey Open-File Report 95-39, 26 p., scale 1:100,000.

Matti, J.C., Brown, H.J., Miller, F.K., Wrucke, C.T., Calzia, J.P., and Conway, C.M., 1993, Preliminary geologic map of the north-central San Bernardino Mountains, California: U.S. Geological Survey Open-File Report 93-544, 10 p., scale 1:100,000.

Matti, J.C., Powell, R.E., and Miller, F.K., 1998, The Blackhawk Mountain uplift, southern California: a Quaternary folded-thrust uplift in the left-stepping Helendale fault zone?: Geological Society of America Abstracts with Programs, v. 30, no. 5, p. 53

Matti, J.C., Powell, R.E., and Miller, F.K., 1998, The San Bernardino Mountains of southern California: a Quaternary fold-, thrust-, and tear-fault belt: Geological Society of America Abstracts with Programs, v. 30, no. 5, p. 53.

Miller, F.K., Matti, J.C., Brown, H.J., and Powell, R.E., 1998, Digital geologic map of the Fawnskin 7.5' quadrangle, California, version 1.0: U.S. Geological Survey Open-File Report 98-579, scale 1:24,000.

Miller, F.K., Matti, J.C., and Brown, H.J., 2000, Digital geologic map of the Butler Peak 7.5' quadrangle, California, version 1.0: U.S. Geological Survey Open-File Report 00-145, scale 1:24,000.

Morton, D.M. and Hauser, R.M.. 2001, A Debris Avalanche at Forest Falls, San Bernardino County, California, July 11,1999. http://geopubs.wr.usgs.gov/open-file/of01-146

Morton, D.M., and Matti, J.C., 1991, Geologic map of the Cucamonga Peak quadrangle, southern California: U.S. Geological Survey Open-File Report 90-694, scale 1:24,000.

Morton, D.M., and Matti, J.C., 1991, Geologic map of the Devore quadrangle, southern California: U.S. Geological Survey Open-File Report 90-695, scale 1:24,000.

Morton, D.M., Woodburne, M.O., Foster, J., 1991, Geologic map of the Telegraph Peak quadrangle, southern California: U.S. Geological Survey Open-File Report 90-693, scale 1:24,000.

Powell, R.E., and Matti, J.C., 1998, Stratigraphic and geomorphic relations in the Mojave Desert and San Bernardino Mts piedmont, Lucerne Valley, CA: PART I: Geological Society of America Abstracts with Programs, v. 30, no. 5, p. 59

Powell, R.E., and Matti, J.C., 1998, Stratigraphic and geomorphic relations in the Mojave Desert and San Bernardino Mts piedmont, Lucerne Valley, CA: PART II: Geological Society of America Abstracts with Programs, v. 30, no. 5, p. 59.


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