Ripple Marks in Gower Gulch
May 10, 2013
Photographer: Rick Scott; Rick's Web Site
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.