On May 25, 2014, a rain-on-snow induced rock avalanche occurred in the West Salt Creek Valley on the northern flank of Grand Mesa in western Colorado. The avalanche traveled 4.6 km down the confined valley, killing 3 people. The avalanche was rare for the contiguous U.S. because of its large size (54.5 Mm3) and long travel distance. To understand the avalanche failure sequence, mechanisms, and mobility, we mapped landslide structures, geology, and ponds at 1:1000-scale. We used high-resolution, Unmanned Aircraft System (UAS) imagery from July 2014 as a base for our field mapping. Here we present the map data and UAS imagery. The data accompany an interpretive paper published in the journal Geosphere. The full citation...
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Collbran,
Colorado,
Grand Mesa,
Green River Formation,
UAS, All tags...
USGS Science Data Catalog (SDC),
Unmanned Aircraft System,
West Salt Creek,
alluvium,
breccia,
debris flow,
debris-flow deposits,
fatalities,
faults,
folds,
hazard,
imagery,
landslide,
normal fault,
ponds,
rain on snow,
rainfall,
rock avalanche,
rock slide,
slip surface,
snowmelt,
springs,
strike-slip fault,
structures,
thrust fault, Fewer tags
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