Catalina Island Virtual
Web-Lab
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virtual lab before beginning. Clip and complete this web-lab text in
Microsoft Word (or other word processor) and submit inside your for online
course, or print and hand it in for in-person classes.
Do
not highlight or underline answers as they will not be preserved in the online
format.
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1 How are metamorphic rocks formed?
2 What defines a metamorphic facies?
3 What are the index minerals (list 3) for the
Amphibolite Facies
Greenschist Facies
Blueschist Facies
4 Descibe the burial depth and approximate temperature
for each metamorphic facies.
Amphibolite Facies
Greenschist Facies
Blueschist Facies
5 Which metamorphic facies on Catalina island has the
highest (and facies with lowest) degree of metamorphism?
6 Which metamorphic facies on Catalina island is the
oldest and which is the youngest in age?
7 Which metamorphic facies are on the Continental
gradient and which are on Subduction gradient (refer to the depth vs
temperature graph)?
8 How is serpentinite formed?
9 Whats the difference between greenschist and
greenstone?
10 If a metamorphic rock melts what does it become?
5 points
What was did you like and/or dislike about this virtual
fieldtrip?
The metamorphic rocks on Catalina Island
have been studied extensively for years, so there is a large volume of
lierature on the topic, especially considering the peripheral papers tying the
island into the Southern California geology. The reference/resource list below
represents a compilation of the more prominent papers on the topic.
Altheim B.K., Christoffel, C.A., et al,
1997, Detection of subtle variations
in low-T, high-P/T metamorphism in the
Catalina Schist; tectonic and kinetic
implications: Program with Abstracts -
Geological Association of Canada; Mineralogical
Association of Canada; Canadian Geophysical
Union, Joint Annual Meeting, v. 22, p. 2.
Atwater T. 1970, Implications of plate
tectonics for the Cenozoic tectonic evolution of western
North America. Bull. Geol. Soc. Amer., v.
81, p. 3513-3536.
Bailey E.H., 1941, Mineralogy, petrology,
and geology of Catalina Island, California, Stanford
University PhD. Thesis, 193p.
Baldwin SL., Harrison, TM., 1989,
Geochronology of blueschists from west-central Baja
California and the timing of uplift in
subduction complexes. J. Geology, 97, 149-163.
Baldwin SL., Harrison, TM., 1992, The P-T-T
history of blocks in serpentinite matrix melange,
west-central Baja California. Geol. Soc.
America Bull., 104, 18-31.
Bebout G. E., Barton, M. D. 1989. Fluid
flow and metasomatism in a subduction zone
hydrothermal system: Catalina Schist
terrane, California. Geology 17, 976-980.
Bebout G.E., Barton, M.D., 1993,
Metasomatism during subduction: Products and possible
paths in the Catalina Schist, California:
Chemical Geology, v. 108, p. 61–92.
Crouch J K., Suppe, J, 1993, Late Cenozoic
tectonic evolution of the Los Angeles Basin and
inner California borderland; a model for
core complex-like crustal extension, Geological
Society of America Bulletin, v. 105, p. 1415-1434.
Crowell J.C., 1981, An outline of the
tectonic history of southeastern California, in Ernst, W. G.,
ed., The geotectonic development of
California (Rubey Vol. I): Englewood Cliffs, New
Jersey, Prentice-Hall, p. 583-600.
Dibblee T.W. Jr., 1999, Geologic map of the
Palos Verdes Peninsula and vicinity, Redondo
Beach, Torrance, and San Pedro Quadrangles,
Los Angeles County, California, Dibblee
Geological Foundation, Camarillo, CA.
Gastil R.G., Miller, R.H. 1993,
Prebatholithic history of Peninsular California, Geological Society of
America Special Paper 279, p. 145–156.
Grove, M.,Bebout, G.E., 1995. Cretaceous
tectonic evolution of coastal southern California:
Insights from the Catalina Schist.
Tectonics, 14, 1290-1308.
Grove M, Bebout G.E. 2006 Medial Cretaceous
Subduction Erosion of Southwestern North
America: New Hypothesis for the Formation
of the Catalina Schist
Grove M, Bebout G.E. 2008 The Catalina
Schist, evidence for middle Cretaceous subduction erosion of Southwestern
United States.
Nicholson, C., Sorlien, C. C., Atwater, T.
et al, 1994, Microplate
capture, rotation of the western Transverse
Ranges, and initiation of the San Andreas
transform as a low-angle fault system:
Geology, v. 22, p. 491–495.
Nilsen T. H., Abbott, P. L., 1981,
Paleogeography and sedimentology of Upper Cretaceous
turbidites, San Diego, California: American
Association of Petroleum Geologists
Bulletin, v. 65, p. 1256-1284.
Peacock S.M., 1987. Creation and
preservation of subduction-related metamorphic gradients. J.
geophys. Res. 92, 12,763-12,781.
Platt, J.P., 1975, Metamorphic and
deformational processes in the Franciscan Complex,
California: Some insights from the Catalina
Schist terrane. Geol. Soc. America Bull., 86,
1337-1347.
Platt J.P., 1976, The petrology, structure,
and geologic history of the Catalina Schist terrain,
southern California. University of
California Publications Geological Sciences 112, 111
pp.
Sanders
S. Q., Vedder J. G. 1987 Miocene Geologic History of Eastern Santa Catalina
Island, California
Sorensen, S. S., 1988. Petrology of
amphibolite-facies mafic and ultramafic rocks from the
Catalina Schist, southern California:
metasomatism and migmatization in a subduction
zone metamorphic setting. J. metamorphic
Geol. v. 6. pp. 405-435.
Sorensen S.S., 1986, Petrologic and
geochemical comparison of the blueschist and greenschist
units of the Catalina Schist terrane,
southern California. Geological Society of America
Memoir 164: 59-75.
Sorensen, S.S., Barton, M.D., 1987,
Metasomatism and partial melting in a subduction
complex: Catalina Schist, southern
California. Geology 15: 115-118.
Sorensen, S.S., Grossman, J.N., 1989,
Enrichment of trace elements in garnet amphibolites
from a paleo-subduction zone: Catalina
Schist, southern California. Geochimica et
Cosmochimica Acta 53, 3155-3177.
Weaver, D.W., Nolf, B., 1969, Geology of
Santa Cruz Island (map), in Weaver, D.W., ed.,
Geology of the northern Channel Islands,
southern California borderland: Pacific Section,
American Association of Petroleum
Geologists Special Publication, scale 1:24 000.
Woodford A.O., 1924, The Catalina
Metamorphic Facies of the Franciscan series: University of
California Pub. Geol. Sciences, v. 15, n.
3, p. 49-68