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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 ....
Research led by the University of Wyoming shows that physical weathering is far more important than previously recognized in the breakdown of rock in mountain landscapes. Because it is difficult to measure, physical weathering has commonly been assumed to be negligible in previous studies. Cliff Riebe, a professor in UW’s Department of Geology and Geophysics, headed a research group that discovered that climate and erosion rates strongly regulate the relative importance of subsurface physical and chemical weathering of saprolite, the zone of weathered rock that retains the relative positions of mineral grains of the parent bedrock and lies between the layer of soil and harder rock underneath. Saprolite is much like the weathered granite found on the flat areas surrounding the hard granite of Vedauwoo. ....
January 13, 2021 Brad Carr, a UW associate research scientist in geology and geophysics, uses the Geoprobe instrument to sample the subsurface in the foothills of the southern Sierra Nevada in California. Carr contributed to a study that was published in the Jan. 12 issue of Geology. The research shows that physical weathering is far more important than previously recognized in the breakdown of rock in mountain landscapes. (Sarah Granke Photo) Research led by the University of Wyoming shows that physical weathering is far more important than previously recognized in the breakdown of rock in mountain landscapes. Because it is difficult to measure, physical weathering has commonly been assumed to be negligible in previous studies. ....