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GSA Annual Meeting in Seattle, Washington, USA - 2017

Paper No. 252-8
Presentation Time: 9:00 AM-6:30 PM

BUT IT LOOKS LIKE A LANDSLIDE IN LIDAR! GEOLOGIC MAPPING OF PUGET LOWLAND GLACIAL RECESSIONAL LANDFORMS ALONG HOOD CANAL USING LIDAR


CONTRERAS, Trevor A., Washington Geological Survey, WA Dept. of Natural Resources, 1111 Washington St SE, MS 47007, Olympia, WA 98504-7007 and STONE, Kimberly A., David Evans and Associates, Inc., 2106 Pacific Ave., Suite 400, Tacoma, WA 98402, trevor.contreras@dnr.wa.gov

Previous geologic mapping and landslide inventories mapped benches along Hood Canal and adjacent drainages as landslides. Recently published 1:24,000-scale lidar based geologic mapping suggests many of these landforms may be the result of ice-marginal drainages and recessional lake shorelines.

Lidar data highlights benches with similar elevations and field observations find sorted sediment interpreted to be shoreline or fluvial deposits on these surfaces, furthermore the strata below these landforms are undeformed. Combining the elevation data and field observations suggests these landforms may be result of ice-marginal drainages and recessional lake shores.

Session No. 252--Booth# 8

T244. Landslide Inventories, Databases, Hazard Maps, Risk Analysis, and Beyond (Posters)
Tuesday, 24 October 2017: 9:00 AM-6:30 PM
Halls 4EF (Washington State Convention Center)
Geological Society of America Abstracts with Programs. Vol. 49, No. 6
doi: 10.1130/abs/2017AM-303585
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