Western Coastal & Marine Geology Posters
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Flying Eyeball Measures Grand Canyon Sand

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USGS Grand Canyon Studies "Underwater Microscope System" - USGS Fact Sheet 135-01 "The internal structure of sand bars on the Colorado River, Grand Canyon, as determined by ground-penetrating radar" - USGS Open-File Report 01-425 Sedimentologic Engineering in Grand Canyon view or download files for printing: page-size PDF file (998 kb) poster-size PDF file (1.2 MB, 3 feet by 4 feet)