Pahoehoe

Pahoehoe (lava rock)

This sample preserves the ropey texture of lava that once flowed and cooled rapidly on the surface of a lava flow. The orignal lava may have been basalt, andesite, or dacite in composition, but has been weathered to its buff-colored appearance.
https://gotbooks.miracosta.edu/rocks/igneous/42.html 2/2/2021