Interesting bit of rock

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Bosterson
Posts: 1708
Joined: May 18th, 2009, 3:17 pm
Location: Portland

Interesting bit of rock

Post by Bosterson » April 24th, 2017, 9:52 am

Geologists! What's going on with this rock? A white patina (thin and plasticky) on top of aerated volcanic stuff (found in the Nesmith area). Looks like some sort of volcanic fusion and heating going on, as if it were trying to make a geode.

Image
Will hike off trail for fun.

Limey
Posts: 580
Joined: December 19th, 2012, 2:34 pm

Re: Interesting bit of rock

Post by Limey » April 27th, 2017, 9:14 am

I was hoping someone would chime in on this. I've seen the same kind of thing on the east side of hwy 35. I always assumed it was some kind of fungus but it just didn't seem quite right for that.

Fishinandgold
Posts: 42
Joined: March 9th, 2015, 2:13 pm

Re: Interesting bit of rock

Post by Fishinandgold » April 28th, 2017, 7:29 pm

I believe its silica deposited in cracks in the rock by rain water. In other words its a little mini quartz vein.

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