HR: 0800h
AN: H51C-0380    [Abstracts]
TI: Sackung and Rockslide Denudation In Baltoro, Braldu, and Shigar Areas, Karakoram Himalaya
AU: * Shroder, J J
EM: jshroder@mail.unomaha.edu
AF: JOHN (JACK) F. SHRODER, JR, DEPARTMENT OF GEOGRAPHY & GEOLOGY, UNIVERSITY OF NEBRASKA AT OMAHA, OMAHA, NE 68182 United States
AU: Bishop, M P
EM: mpbishop@mail.unomaha.edu
AF: JOHN (JACK) F. SHRODER, JR, DEPARTMENT OF GEOGRAPHY & GEOLOGY, UNIVERSITY OF NEBRASKA AT OMAHA, OMAHA, NE 68182 United States
AB: In the K2 Project to investigate landform evolution in the Karakoram Himalaya, four major mass-movement complexes (Ghoro Choh rock avalanche complex, Busper sackung, Gomboro slope failure complex, Urdokas rockslide complex) were mapped and analyzed in summer 2005. The 3-4 km of local relief, coupled with steep slopes and high to intermediate magnitude and frequency, snow and rain storms, and freeze-thaw events there provide considerable potential-, gravitational-, thermal-, and kinetic-energy sources that drive the varied mass-movement processes. The products of these mass movements and other types are ubiquitous, including failure of entire massive slopes of crystalline rock (gneisses, metasediments, granites) to depths of hundreds of m, piling up considerable colluvial sediment depths on valley floors and sidewalls, causing river-damming inundations and catastrophic breakout floods, or forming the extensive supraglacial debris covers so characteristic of the glaciers of the region. The role of lithology, foliation, faulting, and jointing is important in controlling style and magnitude of failure, as well as glacial-erosion shear-strength reduction and downwasting-ice, valley-wall debuttressing, water and ice loading, and freeze and thaw.
DE: 1810 Debris flow and landslides
DE: 1815 Erosion
DE: 1817 Extreme events
DE: 1826 Geomorphology: hillslope (1625)
SC: Hydrology [H]
MN: Fall Meeting 2005