Very interesting large rock

johnyc100

Tenderfoot
May 5, 2013
7
1
Primary Interest:
All Treasure Hunting
A long time ago my brother found this rather larger rock in northern ontario canada, I think near a river.

it weights about 20lbs and measures about 6"wx12"l

Any info/thoughts appreciated, I searched the net and could not find anything like it.



P5040141.JPG
 

looks like an coral rock or something that had life in it before
 

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Looks volcanic to me. If its light it could be pumice, if its heavy it might be something else in the Rhyolite type rocks.
 

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I submit that it is a sponge coral sample.....sponge.jpg
 

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Looks like the stuff that washes up on the beaches down here in Florida that feel like Legos when you step on em. So my guess is Coral.
 

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