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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 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 • Dating planned of Alec Butte • determine if faults happened post 2.89ma
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