[email protected] wrote:
My trouble is I can't find any pictures of a non cracked geode
definitely from this place. Even the back side would be
helpful. I am not even certain if the geodes shown were found
as base ball sized rocks in mud, or were embedded in boulders
and we are seeing the result of hours of material removal and
polish. If anyone could advise me on how to identify a-not-found-imbedded-in-a-basalt-cliff geode from Walker
valley, my kids and I would be grateful! Any further advise on
specific places to find these cool rocks would be amazing.
Thanks a million!
IMO, since the hardness and composition of the material on the
outside of the geode is about the same as on the inside I think it
unlikely that there are geodes laying around. I've found basalt
encased crystalline voids in other places in the USA but I really
could not call them geodes. The WA photos and vids show a lot of
hard work chopping them out of the basalt matrix and they look
similar to other void types that I have found. You may be
thinking of limestone matrix and silicate geodes like in Indiana.
The limestone matrix is quite a bit softer than the silicate and
you can find silicate balls in creek beds in IN, OH, KY, etc.
Some are hollow and some aren't. Brazilian geodes are formed
similarly to the limestone geodes but with a different matrix
material.
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