Very interesting large rock

[johnyc100]

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.

 

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[haraldmartin]

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

 

[johnyc100]

Never thought of that your probably right...

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

 

[Lygore]

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

 

[bigfoot1]

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

 

[johnyc100]

It's pretty heavy about 20lbs

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

 

[Whatacoin]

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.