Is this Amerish or is it lava?

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As tweeted by T-Ray:
http://a.yfrog.com/img877/320/m2fam.jpg

Zooming in on the left lower corner you see a little dark smoke and some tube like structures that you'd expect in a volcanic environment...but that looks a lot like a river running through the middle.

I'm hoping that this is actually the boundary between the grassy wet plains and volcanic biome, both on amerish. I can hope, right?

The spikey rocks all over don't look like a highland kinda place at all, though. They definitely seem volcanic.

Potentially its a river of lava.