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Does this mean...?

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Dakota Kid:
I found this today while fishing a creek with my daughter. It's decent material, but the really unique part is it looks like it just came out of a cliff face. All of the local material I find has been pushed here by glaciers during the last ice age. None of it looks like this after that kind of abuse. At the very least it looks like it's been tumbled with no hard edges. This looks like the shale and slate jutting out from any of the numerous rock faces in the gorges cut by the creeks. Would you all assume that somewhere up stream from where I found it there's a deposit amongst the shale and slate?

GlisGlis:
yup
looks like you just found a good source of stone

Outbackbob48:
Mike, I don't know much about our local stuff, but when I get onondago from a guy at Letchworh it looks real blocky like your pc, I know some of these guys are collecting on the candian side right out of the lake not far down the other side.  Hope you found a source on our side and those blocky pcs can be a real challenge. I did find a beautiful 4" x 1" blade in one of those blocks, I think the guy that gave it to me thought it was a pc of junk. Bob

Dakota Kid:
Bob the more I think about it and research there almost has to be some deposits in those shale cliffs somewhere. They may be small which will make them all the more difficult to locate, but likely are out there somewhere. Looks like I have some hiking i my future. Hopefully it won't involve any repelling. Shale is a mountaineering nightmare.
I'm also convinced that I can find that primo material without the all-to-common freeze cracks the larger pieces have if I skin dive for it. I don't have a wet suit so I won't be testing this theory for a few months yet.

Zuma:
Black and grey cherts like yours are usually found in Devonian deposits.
Usually lenses with lots of fossils. Used extensively by Aboriginals.
I am not positive about Onondaga but I think it is Devonian era.
Zuma

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