u/Moldculture

I have found several tiny chips of this in the same general area before, but this is the first significant chunk I’ve come across. It has some similarities to our local variolitic basalt (colloquially known as “turtle rocks” around here) and was found on a stretch of beach that yields many of them. But the formation is much more compartmentalized, frothy in spots, and seems to contain some quartz as well. Approximate dimensions: 2 x 1 5/8 x 1 in.