2016
DOI: 10.12789/geocanj.2016.43.100
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Magmatism and Extension in the Foreland and Near-Trench Region of Collisional and Convergent Tectonic Systems

Abstract: Foreland magmatism occurs in the lower plate during arc–continent or continent–continent collision, although it is uncommon. Ancient examples are recognized by a stratigraphic section into which mafic lavas and/or shallow sills are emplaced at a level at the top of a passive margin cover sequence, or within the overlying deeper water deposits that include mudrocks and flysch-type turbidites. Extensional structures associated with the emplacement of the volcanic rocks may develop slightly prior to or contempora… Show more

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“…Early tectonic models of the Taconic orogeny involved a single eastward-dipping subduction zone (present coordinates) under an arc (Bronson Hill arc; e.g., Jacobi, 1981;Rowley and Kidd, 1981;Stanley and Ratcliffe, 1985;Bradley and Kidd, 1991;Ratcliffe et al, 1998Ratcliffe et al, , 1999Hollocher et al, 2002;Schoonmaker et al, 2016). In these models, the west-directed Taconic thrusts represented the Taconic accretionary prism, and the northerly striking normal faults west of the thrusts in eastern New York State represented the Laurentian continent fl exing and stretching as it passed into the trench.…”
Section: Appendix A: Plate-tectonic Models Taconic Plate-tectonic Modmentioning
confidence: 99%
“…Early tectonic models of the Taconic orogeny involved a single eastward-dipping subduction zone (present coordinates) under an arc (Bronson Hill arc; e.g., Jacobi, 1981;Rowley and Kidd, 1981;Stanley and Ratcliffe, 1985;Bradley and Kidd, 1991;Ratcliffe et al, 1998Ratcliffe et al, , 1999Hollocher et al, 2002;Schoonmaker et al, 2016). In these models, the west-directed Taconic thrusts represented the Taconic accretionary prism, and the northerly striking normal faults west of the thrusts in eastern New York State represented the Laurentian continent fl exing and stretching as it passed into the trench.…”
Section: Appendix A: Plate-tectonic Models Taconic Plate-tectonic Modmentioning
confidence: 99%