Surging advance of front of an `a`a flow
![photo of lava](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/20020223-0015_DAS_large.jpg?itok=YtHmFjV8)
Detailed Description
Series of four images taken in early morning sun showing surging advance of front of an `a`a flow, a distributary of the branch of the cascading river shown in right image above. This image taken at 07:12:14.
Sources/Usage
Public Domain.