Landslides | |
av | avalanche chute (usually associated with debris flow |
blsl | block slide (rock or earth) |
blstrm | block stream |
bs | bedrock slump |
bs/ds | bedrock slump/debris slump |
dav | debris avalanche |
df | derbis flow |
dlef | debris-laden earth flow |
ds | debris slump |
ef | earth flow |
es | earth slump |
f | flow (earth or debris-laden earth) |
frf | flowing rock fragments |
m | multiple |
mblsl | multiple block slide (rock or earth) |
mdf | multiple debris flow |
mf | multiple flow (earth or debris-laden earth) |
mrff | multiple rock fragment flow |
mrs | multiple rock slide |
ms | multiple slump (bedrock, debris, or earth) |
rf | rock fall |
rff | rock fragment flow |
rg | rock glacier |
rga | rock glacier--active |
rgi | rock glacier--inactive |
rs | rock slide |
s | slump |
s/f | slump/flow complex |
solif | solifluction |
tf | talus flow |
/ | complex, in combination with |
Sediment and landform units | |
ac | alluvial cone |
af | alluvial fan |
cc | colluvial cone |
Qal | Quaternary alluvium |
Qg | Quaternary glacial deposits |
Qlg | Quaternary landslide and (or) glacial deposits, undifferentiated |
Qt | Quaternary talus |
sw | slope wash |
Complex slope movements. Simple slide forms rarely occur in nature. Usually, slope movements are composed of combinations of the basic forms. Those combinations are called complex slope movements. The most common combination is a slump/earth flow. Destabilization on a slope can begin with a slump, which generally breaks down into smaller components. The downslope and basal portion of the slump can become highly fractured and dissaggregated. If the water content is high enough, those portions of the slump may begin to flow, resulting in a slump/earth flow. Other common types of complex slope movement include debris slump/debris-laden earth flow, rock slide/rock fall, and slump/topple. Multiple block slides/multiple flows, rock slides/talus flow, and rock fall/debris flows can also be found in areas of the State.