Geology of the footwall of the northern Plomosa Mountains metamorphic core complex, west-central Arizona
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The northern Plomosa Mountains is a N-S trending range in the lower Colorado River Extensional Corridor, west-central Arizona – a region which hosts several highly extended terrains known as metamorphic core complexes. Metamorphic core complexes are characterized by low-angle normal faults (detachment faults) which have accommodated tens of kilometers of extension, and juxtapose a brittlely-deformed hanging wall against a ductilely-deformed footwall. The primary structural feature of the northern Plomosa Mountains is the Plomosa detachment fault, a gently-dipping low-angle normal fault. Though ...