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Brothers Fault Zone

Brothers Fault Zone. D. Dziekan. Overview. Regionally extensive fault zone Faulting strikes mainly northwest Alec Butte overlooks faulting. Alec Butte. Cinder cone Overlies olivine basalt dated at 6.68ma Formed before faulting Cut by faults 2.89 ma Iron Mt. unbroken

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Brothers Fault Zone

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  1. Brothers Fault Zone D. Dziekan

  2. Overview • Regionally extensive fault zone • Faulting strikes mainly northwest • Alec Butte overlooks faulting

  3. Alec Butte • Cinder cone • Overlies olivine basalt dated at 6.68ma • Formed before faulting • Cut by faults • 2.89 ma Iron Mt. unbroken • Dating planned of Alec Butte • determine if faults happened post 2.89ma

  4. Dashed northwest, solid northeast

  5. Brother’s Fault • Dextral oblique-normal fault • Strike-slip to dip-slip ratio 1:1 • Some faults crosscut normal strike • Model designed to explain crosscut faults

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