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Acoustic Backscatter Image
of Crater Lake, Oregon

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Acoustic backscatter of Crater Lake, OR. The surrounding land is a shaded-relief topography image generated from USGS 7.5 minute DEM's. In the backscatter image, brighter contrasts are stronger acoustic returns from the lake floor, possibly rock, whereas darker contrasts are weaker acoustic returns from the lake floor, possibly soft sediment.

In the backscatter amplitude gray-level key, dB (decibels) is the intensity of the backscattered acoustic pulse.

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U.S. Department of the Interior    U.S. Geological Survey    Western Coastal & Marine Geology    Seafloor Mapping

URL: http://walrus.wr.usgs.gov/pacmaps/cl-mos.html
maintained by Pete Dartnell
last modified 15 November 2006 (lzt)