Geologic Sites in the Brevard Fault Zone

Where the Brevard fault zone crosses northwest Atlanta, several sites expose crushed, distorted rock, including mylonite, button schist, fractured gneiss, and sheared granite. A few sites:

Ga. Hwy. 20 at Suwanee Dam Road

Felsic/intermediate gneiss that looks suspiciously like Clairmont formation.
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Ga. Hwy 400 SB at Glenridge Connector entrance ramp

Schist and mylonite
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I-285 EB near Ashford-Dunwoody Road

Long Island gneiss
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Cumberland Parkway backroads

Gneiss, blastomylonite, etc.
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Northside Drive approaching I-285

Seriously fractured roadcut
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Rottenwood Creek (Chattahoochee tributary)

Creek-bed rock: garnet-kyanite mica schist, pegmatite, etc.
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Palisades East and West -- Chattahoochee River National Recreation Area

Cliffs of gneiss and schist
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Vinings and other northwest Atlanta sites

Northeast-trending ridges
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U.S. Highway 41 near I-75 (Mount Paran Road exit)

Long Island gneiss
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Construction sites, e.g. Stillhouse Road

Park and look!
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I-285 near US 78

Mylonite and sheared Palmetto granite