Clarey's (2012) model for South Fork (SF) thrusting contains major errors as regards timing of emplacement, number of emplacement events, magnitude of displacement, and geometry of the SF allochthon. A model better supported by data: (1) has SF thrusting taking place before local emplacement of the Heart Mountain (HM) allochthon, rather than after; (2) has emplacement of the SF allochthon by multiple events rather than by a single catastrophic event; (3) envisions only gradual changes in the magnitude of displacement along strike of the SF thrust system, rather than abrupt doubling of displacement across tear faults; (4) regards the SF...

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