Archive - Ripple Marks in Gower Gulch

May 12, 2019

Ripple Marks Gower Gulch Death Valley Rick Scott (for EPOD) (2)

Each Sunday we present a notable item from our archives. This EPOD was originally published May 10, 2013.

: 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.