Schist of various types and ages, unit 1 (Peninsular Ranges) (CAsch1;0)

State	California
Name	Schist of various types and ages, unit 1 (Peninsular Ranges)
Geologic age	Triassic(?)
Lithologic constituents	Major Metamorphic > Schist > Pelitic-schistMostly pelitic schist; also includes locally pebbly quartz-mica schist Minor Metamorphic > GneissGradational with schist Metamorphic > Metasedimentary > Metaclastic > QuartziteMostly calc-silicate-bearing feldspathic quartzite; also includes pure quartzite Incidental Sedimentary > Clastic > ConglomerateMetamorphosed Metamorphic > Metasedimentary > Metacarbonate > Marble Metamorphic > Metaigneous > Metavolcanic Metamorphic > AmphiboliteProbably represents metamorphosed mafic flows, tuff, tuff-breccia, and sills. Locally grades into fine-grained gabbro
Comments	Julian Schist of southern Peninsular Ranges. Consists primarily of pelitic schist and feldspathic quartzite
Stratigraphic units	Julian Schist
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. Strand, R.G., 1962, Geologic map of California, Olaf P. Jenkins edition, San Diego-El Centro sheet, scale 1:250,000. Rogers, T.H., 1966, Geologic map of California, Olaf P. Jenkins edition, Santa Ana sheet, scale 1:250,000. Germinario, Mark, 1993, The early Mesozoic Julian Schist, Julian, California, in Gastil, R.G., and Miller, R.H., eds., The prebatholithic stratigraphy of peninsular California: Geological Society of American Special Paper 279, p. 107-118. Todd, V.R., Erskine, B.G., and Morton, D.M., 1988, Metamorphic and tectonic evolution of the northern Peninsular Ranges Batholith, southern California, in Ernst, W.G., ed., Metamorphism and crustal evolution of the western United States (Rubey Volume 7): Englewood Cliffs, N.J., Prentice-Hall, p. 894-937.
NGMDB product	NGMDB product page for 96750
Counties	San Diego

State

California

Name

Schist of various types and ages, unit 1 (Peninsular Ranges)

Geologic age

Triassic(?)

Lithologic constituents

Major

Metamorphic > Schist > Pelitic-schistMostly pelitic schist; also includes locally pebbly quartz-mica schist

Minor

Metamorphic > GneissGradational with schist

Metamorphic > Metasedimentary > Metaclastic > QuartziteMostly calc-silicate-bearing feldspathic quartzite; also includes pure quartzite

Incidental

Sedimentary > Clastic > ConglomerateMetamorphosed

Metamorphic > Metasedimentary > Metacarbonate > Marble

Metamorphic > Metaigneous > Metavolcanic

Metamorphic > AmphiboliteProbably represents metamorphosed mafic flows, tuff, tuff-breccia, and sills. Locally grades into fine-grained gabbro

Comments

Julian Schist of southern Peninsular Ranges. Consists primarily of pelitic schist and feldspathic quartzite

Stratigraphic units

Julian Schist

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.

Strand, R.G., 1962, Geologic map of California, Olaf P. Jenkins edition, San Diego-El Centro sheet, scale 1:250,000.

Rogers, T.H., 1966, Geologic map of California, Olaf P. Jenkins edition, Santa Ana sheet, scale 1:250,000.

Germinario, Mark, 1993, The early Mesozoic Julian Schist, Julian, California, in Gastil, R.G., and Miller, R.H., eds., The prebatholithic stratigraphy of peninsular California: Geological Society of American Special Paper 279, p. 107-118.

Todd, V.R., Erskine, B.G., and Morton, D.M., 1988, Metamorphic and tectonic evolution of the northern Peninsular Ranges Batholith, southern California, in Ernst, W.G., ed., Metamorphism and crustal evolution of the western United States (Rubey Volume 7): Englewood Cliffs, N.J., Prentice-Hall, p. 894-937.

NGMDB product

NGMDB product page for 96750

Counties

San Diego