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Precambrian granitic rocks, unit 3, (San Gabriel Mountains Granite)

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Precambrian granite, syenite, anorthosite, and gabbroic rocks in the San Gabriel Mountains; also various Precambrian plutonic rocks elsewhere in southeastern California
State California
Name Precambrian granitic rocks, unit 3, (San Gabriel Mountains Granite)
Geologic age Late Triassic
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granite (Pluton)
Comments San Gabriel Mountains. Echo Granite
Stratigraphic units Echo Granite
References

Jennings, C.W., Strand, R.G., Rogers, T.H., Boylan, R.T., Moar, R.R., and Switzer, R.A., 1977, Geologic Map of California: California Division of Mines and Geology, Geologic Data Map 2, scale 1:750,000.

Jennings, C.W., 1985, An explanatory text to accompany the 1:750,000 scale fault and geologic maps of California: California Division of Mines and Geology, Bulletin 201, 197 p.

Jennings, C.W., and Strand, R.G., 1969, Geologic map of California, Olaf P. Jenkins edition, Los Angeles sheet, scale 1:250,000.

Barth, A.P., Tosdal, R.M., Wooden, J.L., and Howard, K.A., 1997, Triassic plutonism in southern California: southward younging of arc initiation along a truncated continental margin: Tectonics, v. 16, p. 290-304.
NGMDB product
Counties Los Angeles