Low-angle extensional faulting, reactivated mylonites, and seismic reflection geometry of the Newark basin margin in eastern Pennsylvania

Relative timing of CAMP, rifting, continental breakup, and basin inversion: Tectonic significance

“…Prerift rocks were present prior to the start of basin subsidence, and include Precambrian basement and mildly to strongly deformed Paleozoic sedimentary and metasedimentary units. These rocks were deformed in the Appalachian orogenies preceding the assembly of Pangea, and many of the border faults of the rift basins are reactivated Paleozoic structures [e.g., Lindholm, 1978;Swanson, 1986;Ratcliffe and Burton, 1985;Ratcliffe et al, 1986]. Synrift units are rocks that accumulated while the basins were actively subsiding.…”

Rift-basin development: lessons from the Triassic–Jurassic Newark Basin of eastern North America

“…the local-basin hypothesis) (e.g. Barrell 1915;Ratcliffe et al 1986;Manspeizer 1988;Schlische 1993Schlische , 2003 (Fig. 2a).…”

Contrasts in Tectonic style of the Central and Southern Appalachians, United States: Insights from seismic reflection data

“…Ratcliffe and Burton (1985) observed that few of the Mesozoic faults in the Newark basin were pure dip-slip; they noted widespread evidence for combined dextral and normal motion and concluded that simple reactivation of a complex system of curvilinear thrust-ramp structures can explain the fault geometry and the deformational structures in the Newark basin without invoking regional strike-slip pullapart models. There is also strong geologic evidence for the continued reactivation of older faults during the Mesozoic Era to form border and transfer faults for the formation of Triassic half-grabens (Glover et al, 1980;Ratcliffe and Burton, 1985;Ratcliffe et al, 1986;Swanson, 1986;Costain and Ç oruh, 1989;Manspeizer et al, 1989;Olsen and Schlische, 1990;Withjack et al, 1998). Gates (1997) documented petrologic and structural evidence for reactivation of the Brookneal fault zone in the southern Virginia Piedmont during Paleozoic and Mesozoic time as both a fault zone and a conduit for the intrusion of felsic plutons during the Alleghanian orogeny.…”