Warning: people keep calling this common rock 'slag' when it's not

I keep seeing folks post pictures of vesicular basalt, the kind with all the little holes, and everyone jumps to say it's industrial slag. It matters because you're missing a cool volcanic story. Has anyone else run into this mix-up at their local creek beds?

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3 Comments

harper_wright5mo ago

My buddy had the same "slag" thing happen with his basalt find.

4

williams905mo ago

Found a piece in the Poconos last year that got called slag three times before someone ID'd it as basalt, lol.

1

david7395mo ago

Read somewhere that basalt in the Poconos often looks that way because of all the glacial till mixing it up. @harper_wright probably knows that struggle.

1