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Monzogranite, granodiorite, syenite, monzodiorite, monzonite, and diorite; Eocene phaneritic to porphyro-aphanitic intrusions (subunits are Teif and Teii); northern Idaho to central Idaho

Eocene intrusions including large granitic plutons and dike swarms of central Idaho
StateIdaho
NameMonzogranite, granodiorite, syenite, monzodiorite, monzonite, and diorite; Eocene phaneritic to porphyro-aphanitic intrusions (subunits are Teif and Teii); northern Idaho to central Idaho
Geologic ageEocene
Original map labelTei; Ki; Kif; Kii; Kim; pKi; Tev; Ti; Zi
CommentsTei includes Eocene porphyro-phaneritic to porphyro-aphanitic intrusions of the quartz monzodiorite and monzogranite suites of ID008, unidivided. Based on unit references cited and linked to Tei, AAB changed some polygons to Tei that were previously classified on ID001 as Ti, Tev, Ki, Kif, Kim, and Zi. Some Tei represents granitoid rocks that could not be confidently assigned to one suite or the other.
Primary rock typegranite
Secondary rock typequartz monzodiorite
Other rock typesgranodiorite
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granite > Monzogranite (Pluton)undivided plutons of granite and quartz-monzodiorite suites
Minor
Igneous > Plutonic > Granitic > Granodiorite (Pluton)undivided granodiorite of quartz monzodiorite suite
Igneous > Plutonic > Dioritic > Quartz-monzodiorite (Pluton)undivided quartz monzodiorite
Incidental
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-andesite (Dike or sill)porphyro-aphanitic dikes and plugs of andesitic composition
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Dike or sill)porphyro-aphanitic dikes and plugs of dacitic composition
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Dike or sill)porphyro-aphanitic dikes and plugs of rhyolitic composition
Igneous > Plutonic > Syenitic > Quartz-syenite (Pluton)undivided quartz syenite of quartz monzodiorite suite
Igneous > Plutonic > Dioritic > Diorite (Pluton)undivided diorite of quartz monzodiorite suite
Igneous > Plutonic > Dioritic > Monzodiorite (Pluton)undivided monzodiorite of quartz monzodiorite suite
Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)undivided quartz diorite of quartz monzodiorite suite
Igneous > Plutonic > Granitic > Granite > Syenogranite (Pluton)undivided syenogranite of pink granite suite
Igneous > Plutonic > Syenitic > Quartz-monzonite (Pluton)undivided quartz monzonite or monzogranite
Map references
Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000.
Unit references
Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000.
Lewis, R.S., and Kiilsgaard, T.H., 1991, Eocene plutonic rocks in south central Idaho: Journal of Geophysical Research, v. 96, no. B8, p. 13,295-13,311.
Evans, K.V. and Green, G.N., 2003, Geologic map of the Salmon National Forest and vicinity, east-central Idaho: U.S. Geological Survey Geological Investigations Series I-2765, scale 1:100,000 with pamphlet, 19 p.
Rember, W.C. and Bennett, E.H., 1979, Geologic map of the Pullman quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Pullman 2o Quadrangle, scale 1:250,000.
Worl, R.G., Kiilsgaard, T.H., Bennett, E.H., Link, P.K., Lewis, R.S., Mitchell, V.E., Johnson, K.M., and Snyder, L.D., 1991, Geologic map of the Hailey 1o x 2o quadrangle, Idaho: U.S. Geological Survey Open-File Report 91-340, 1:250,000 scale.
Lewis, R.S., Burmester, R.F., Kauffman J.D., and Frost, T.P., 2000, Geologic map of the St. Maries 30 x 60 minute quadrangle, Idaho: Moscow, Idaho, Idaho Geological Survey Geologic Map 28, 1:100,000 scale, pamphlet, 36 p.
Lewis, R.S., 2003, Unpublished report on IGS digital geologic maps in preparation, north-central Idaho: Moscow, Idaho, Idaho Geological Survey, 1:100,000 scale.
Bennett, E.H., and Knowles, C.R., 1985, Tertiary plutons and related rocks in central Idaho: in McIntyre, D.H., ed., Symposium on the Geology and Mineral Deposits of the Challis 1o x 2o Quadrangle, Idaho: U.S. Geological Survey Bulletin 1658 A-S, chapter F, p. 81-95.
Geographic coverageBenewah - Blaine - Boise - Bonner - Butte - Clearwater - Custer - Elmore - Idaho - Latah - Lemhi - Shoshone - Valley

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