Part three地难豪层的量 Mass Wasting Processes BEDROCK RY RAPIO Masoo ba 0i stump aslope- RY SLOW wE科A种D CONSOLIDATED MATERIALS MIx D HOCK AND sOI MOSTLY PLASTIC EXTHEMELY RAPID RAPD TO VERY RAPD E PPHOKIMATE RATE Extremely EXTREMELY HAPID. APID TO VERY RAPD Figure 6.1 Classification of landslides(from varnes, 1958) 环境地质学 Environmental Geology
Part three 地球表层的塑造过程 环境地质学Environmental Geology Mass Wasting Processes
Part three地难豪层的量 Mass Wasting Processes BEDROCK Rockfall Rockfall occurs where a cliff of bedrock is exposed to weathering and pieces of the bedrock are pried loose and fall bounce, or roll to rest at the base of the cliff The resulting deposit is 是一叫“m called talus崩塌岩堆( Behre, and ol san cla 1933; Schumm and Chorley, c下xR CONSOLIDATE MATERIALS 1966;Rapp,1976).nan MIxED ROCKS AND SOIL MOSTLY PLASTIC irregularly eroded cliff, talus Rock cones may develop in the guly冲中沟 head areas Fig 6.2).In more extensive RAPID RA种 OTDVEHY x制 ATE RATE OF MOVEMENT cfs, coalescing聚集taus Rapid earthflow cones form a more -Y RAPID Very tapid continuous blanket of debris referred to as scree山麓碎 PID TO VERY AAPT Ai( Jeffreys, 1932; Adrews 1961) Figure 6.1 Classification of landslides(from Varnes, 1958) 环境地质学 Environmental Geology
Part three 地球表层的塑造过程 环境地质学Environmental Geology Mass Wasting Processes Rockfall Rockfall occurs where a cliff of bedrock is exposed to weathering and pieces of the bedrock are pried loose and fall, bounce, or roll to rest at the base of the cliff. The resulting deposit is called talus崩塌岩堆 (Behre, 1933; Schumm and Chorley, 1966; Rapp, 1976). In an irregularly eroded cliff, talus cones may develop in the gully冲沟 head areas (Fig.6.2). In more extensive cliffs, coalescing聚集talus cones form a more continuous blanket of debris referred to as scree 山麓碎 石(Jeffreys, 1932; Adrews, 1961)
Part three地难豪层的量 Mass Wasting Processes Rockfall Soil fai Talus will not rest at an angle greater than the angle of repose. The angle of epose is measured similarly to dip of sedimentary rocks MNOOE RATE e. from the horizontal and Earth now is typically about 33-35 atol by bedane plane Bedrock composition as /emend of son clays well as talus particle size UNCONSOLIDATED MATERIALS angularity, and sorting, has MIXEDROCKSANOSoR MOSTLY PLASTIC some effect on the angle of repose; large angular boulders may rest at up to 40. The angle of repose of RAPID HAPID TO VERY RAPID tATA APPHOXIMATE科 ATE OF open-pit mine waste rock is Rapid earthflow Estreme approximately 38 ERY问APD RAPIO TO V HY HAPD Figure 6.1 Classification of landslides(from Varnes, 1958). 环境地质学 Environmental Geology
Part three 地球表层的塑造过程 环境地质学Environmental Geology Mass Wasting Processes Rockfall Talus will not rest at an angle greater than the angle of repose. The angle of repose is measured similarly to dip of sedimentary rocks, i.e., from the horizontal, and is typically about 33-35°. Bedrock composition, as well as talus particle size, angularity, and sorting, has some effect on the angle of repose; large angular boulders may rest at up to 40°. The angle of repose of open-pit mine waste rock is approximately 38°