See more from this Division: Topical Sessions
See more from this Session: Continental and Marine Fold and Thrust Belts II
Abstract:
Based on biostratigraphic and sequence stratigraphic correlations we review the stratigraphic architecture of the western foothills thrust belt and its foreland, identifying stratigraphic omissions on structural highs and their control on distribution of activated detachment horizons. In addition, N-S-trending along-strike sections illustrate the role of pre-existing normal faults and half grabens, which affected the passive margin up to the level of the Upper Miocene to Lower Pliocene Kueichulin formation. These faults are largely held responsible for the often highly non-cylindric geometry of many thrust sheets, often characterized by splay faults and oblique ramps. We illustrate these phenomena with examples from the Shuangtung thrust sheet in the area of Puli (central Taiwan) and the densely populated area around Chia-Yi (southwestern Taiwan), where the seismically active Meishan fault represents a highly oblique ramp nucleating along a reactivated normal fault.
See more from this Division: Topical Sessions
See more from this Session: Continental and Marine Fold and Thrust Belts II