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Frontiers | Mid-Miocene to Present Upper-Plate Deformation of the Southern Cascadia Forearc: Effects of the Superposition of Subduction and Transform Tectonics

The southern Cascadia forearc undergoes a three-stage tectonic evolution, each stage involving different combinations of tectonic drivers, that produce differences in the upper-plate deformation style. These drivers include subduction, the northward migration of the Mendocino triple junction (MTJ) and associated thickening and thinning related to the Mendocino Crustal Conveyor (MCC) effect, and the NNW translation of the Sierra Nevada-Great Valley (SNGV) block. We combine geodetic data, plate reconstructions, seismic tomography and topographic observations to determine how the southern Cascadia upper plate is deforming in response to the combined effects of subduction and NNW-directed (MCC- and SNGV-related) tectonic processes. The location of the terrane boundaries between the relatively weak Franciscan complex and the stronger KMP and SNGV block has been a key control on the style of upper-plate deformation in the southern Cascadia forearc since the mid-Miocene. At ~15 Ma, present-da ....

United States , Siskiyou Mountains , New Zealand General , New Zealand , Trinidad And Tobago , United Kingdom , Sierra Nevada , San Andreas , South Island , Eaton Roughs , Sacramento Valley , San Francisco , Lake Mountain , Klamath Mountains , Bald Mountain , Baja California , San Francisco Bay , San Andreas Fault , Isla Santa Maria , Ma Atwater , Fuca Euler , Sierran Microplate , America Demets , Tectonostratigraphic Terranes , Yolla Bolly , Andreas Pacific North America ,

Frontiers | Analysis of Hillslope Erosion Based on Excess Topography in Southeastern Tibet

1
1Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China
2China-Pakistan Joint Research Center on Earth Sciences, CAS-HEC, Islamabad, Pakistan
3China Railway Eryuan Engineering Group Co. Ltd., Chengdu, China
4University of Chinese Academy of Sciences, Beijing, China
5Earth and Atmospheric Sciences, Indiana University, Bloomington, IN, United States
The southeastern Tibetan Plateau has been deeply dissected by major rivers and their tributaries into high-relief topography with deep gorges. In this region, most hillslope gradients in the high-relief areas approach a threshold value, and landslides are the dominant surface erosion process. For this work, we analyzed the hillslope erosion process by determining the excess topography from the threshold hillslope. Slope analysis found a similar normal distribution of slope values for six large drainage basins with differe ....

Yangtze River , China General , United States , Min River , New Zealand , Papua New Guinea , Azad Kashmir , Tibetan Plateau , Liwen Bianji Edanz , Wolfgang Schwanghart , Katherine Armstrong , Software For Topographic Analysis , National Natural Science Foundation Of China , Drainage Network Evolution , China Geological , Modeling In Earth Surface Sciences , Research On Cognization , Pakistan Joint Research Center On Earth Sciences , China Railway Eryuan Engineering Group Co Ltd , Channel Adjustment To , United States Geological , River Network Disruption , Lancang River , Hengduan Mountain , Gaoligong Mountains , Dadu River ,