Source of the photo
http://www.solarviews.com/browse/volc/pahoe1.jpg
Author of the description
Gruiz Katalin
The picture shows the bazaltic lava flow of the Hawaiian Kilauea volcano. The bazaltic lava lis called "pahoehoe" by the Hawaiians.
Source of description
http://www.solarviews.com/eng/hawaii.htm