Atlanta Lobe Idaho Batholith Photos by Jim Cash Moscow High School.

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Presentation transcript:

Atlanta Lobe Idaho Batholith Photos by Jim Cash Moscow High School

View of Cascade Lake from West Mtn – Long Valley is a fault-bounded graben.

Outcrop of granodiorite West Mountain, west of Cascade, Valley Co.

Outcrop of porphyritic biotite granodiorite and granite., Idaho 75, mp 189

View of exfoliation in granitic rock along S. Fk. Clearwater River

View of Roughneck Peak and hornblende- biotite granodiorite outcrops.

Outcrop of migmatitic rock with near vertical banding, Valley County.

View of massive talus on north side of Foolhen Meadow, Forest Road 48, Valley Co.

Weathering of jointed granite has revealed a face-like sculpture, Forest Road 48, Valley Co.

Glacially polished granitic rock in Sater Meadow, Forest Road 446, Valley Co.

Outcrop of decomposing granite containing many felsic dikes, Highway 95, Adams County.

Outcrop of megacrystic granodiorite. Walkers Peak.

Outcrop of granodiorite crosscut by mafic dike.

Hornblend-biotite granodiorite, Skeleton Creek, cut by felsic dikes, Photo by Reed Lewis

Close-up of foliated hornblende tonalite, Forest Road 446, Valley Co

Thin section of typical biotite granodiorite showing strained quartz grains. Southeast of Big Smoky Creek. Plagioclase feldspar is twinned.

Biotite granodiorite from the Soldier Mountains north of Fairfield. Stained for potassium feldspar (yellow) on right side of slab.

Thin section of typical biotite granodiorite. South Fork of Boise River.

Granodiorite from the Deer Creek stock northwest of Hailey. Stained for potassium feldspar (yellow) on left side of slab.