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Open-File Report 2014–1065

Preliminary Interpretation of Pre-2014 Landslide Deposits in the Vicinity of Oso, Washington

By Ralph A. Haugerud

Abstract

High-resolution topographic surveys allow fairly precise mapping of landslide deposits and their relative ages. Relative ages are determined by cross-cutting relations and the amount of smoothing—more smoothed slide deposits are older—of these deposits. The Tulalip Tribes, in partnership with the Puget Sound Lidar Consortium, acquired a high-resolution lidar (light detection and ranging) survey of the North Fork Stillaguamish River valley in 2013. This report presents a preliminary interpretation of the topography of this area using the lidar data at a scale of 1:24,000.

First posted March 27, 2014

For additional information, contact:
Contact Information, Geology, Minerals, Energy, & Geophysics Science Center—Seattle, Washington
USGS- Univ. of Washington
Dept. of Geology
Box 351310
Seattle, WA 98195-1310
http://geomaps.wr.usgs.gov/

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Suggested citation:

Haugerud, R.A., 2014, Preliminary interpretation of pre-2014 landslide deposits in the vicinity of Oso, Washington: U.S. Geological Survey Open-File Report 2014–1065, 4 p., http://dx.doi.org/10.3133/ofr20141065.

ISSN 2331-1258 (online)

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