Monday, October 3, 2011

Rocks/Geology

I found this unusually sphere-shaped stone on a hike. It's about the size of a large gumball.

What really got me curious, is that a few miles away, I found a second one (the size of large grape) with very similar traits.


The outer shells are both very rough, like a skateboard top. The cut sides are very smooth and dark.


The similarities indicate more of a type of formation, and not just a fluke. Anybody have any clue?

1 comment:

Ryan said...

Looks volcanic. Droplets of obsidian that hardened in mid-air?