Each Sunday we present a notable item from our archives. This EPOD was originally published May 10, 2013.Photographer: Rick Scott Summary Author: Rick Scott The picture above shows ripple marks found at Gower Gulch in Death Valley National Park, California. There are two forms of ripple marks: symmetric, or wave-produced, and asymmetric as seen here. These ripple marks were formed in shallow water by currents flowing over limestone and were perpendicular to the current. Because asymmetrical ripple mark impressions have a slightly steeper dip on their downstream side, they're often used by geologists to determine the direction of flow. Photo taken on March 14, 2013.Photo Details: Canon PowerShot G1 X; Internal 15.1-60.4 mm lens set to 60.4 mm; 1/125 sec. exposure; F/8; ISO 100; in RAW mode; Software: Adobe Photoshop CS5 Windows.
Gower Gulch, Death Valley California Coordinates: 36.411060, -116.840330Related Links
Death Valley Dunes and Former Lake Bed
Rick's Website
Student Links
This Old Earth: Sedimentary Structures
Earth Observatory
Death Valley National Park
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