ericabelle
spending too much on rocks
Instagram acct: @erica_shoots_everything
Member since April 2021
Posts: 482
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Post by ericabelle on May 12, 2021 20:53:25 GMT -5
I found this rock in southern Missouri (Howell County) at the top of a hill. It is very heavy for its size, is not scratched by stainless steel, and magnets have no attraction for it. I would just say its chert or gneiss, but the big mystery is the triangular indentions. Anyone have any ideas on this? I find a lot of heavily weathered rocks at the top of this hill, even though there are none like them on the rest of the hill, which I have always thought was very strange.
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Post by hummingbirdstones on May 13, 2021 9:29:49 GMT -5
Wish I had a clue for you, but I don't. Very cool looking rock, though.
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Post by fernwood on May 13, 2021 11:59:47 GMT -5
What looks like small holes in the second photo remind me of bone.
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Post by amygdule on May 13, 2021 13:38:19 GMT -5
I've seen a few rocks like that before Don't know what they are A well weathered rock Lattice Work
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Post by mohs on May 13, 2021 14:10:56 GMT -5
Yeah I keep looking at it its from the Bermuda triangle area
Some how it migrated to Missouri for your hounding pleasure
and
I will take a mohs i.d. guess
Some sort of heavily pressurized metamorphic/sedimentary/marblizing calcitic/alkaline/ limestoneish agglomerate
Brown- being clayiest slaty soil formed deeply in an ancient lake
I may be wrong on both accounts…mostly
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agatemaggot
Cave Dweller
Member since August 2006
Posts: 2,195
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Post by agatemaggot on May 13, 2021 14:16:15 GMT -5
With the groove around the middle I would guess that it is the head from an old Indian maul. I have a couple shaped just like it ! The big end appears to have impact damage and the top of that hill might be an old Indian camp .
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Post by Peruano on May 13, 2021 18:23:05 GMT -5
For me it looks like a rhyolite with varying degrees of hardness between the dark material and the grey material. It could easily be a metamorphic of an igneous rock or As to a tool, I'd pass on that.
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ericabelle
spending too much on rocks
Instagram acct: @erica_shoots_everything
Member since April 2021
Posts: 482
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Post by ericabelle on May 16, 2021 11:04:37 GMT -5
Yeah I keep looking at it its from the Bermuda triangle area Some how it migrated to Missouri for your hounding pleasure and I will take a mohs i.d. guess Some sort of heavily pressurized metamorphic/sedimentary/marblizing calcitic/alkaline/ limestoneish agglomerate Brown- being clayiest slaty soil formed deeply in an ancient lake I may be wrong on both accounts…mostly Yes, definitely from the Bermuda Triangle area! What happens to all the lost ships, people, and planes that disappear from the Bermuda Triangle? They show up in Missouri, of course. It certainly explains a lot around here.....
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ericabelle
spending too much on rocks
Instagram acct: @erica_shoots_everything
Member since April 2021
Posts: 482
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Post by ericabelle on May 16, 2021 11:07:06 GMT -5
With the groove around the middle I would guess that it is the head from an old Indian maul. I have a couple shaped just like it ! The big end appears to have impact damage and the top of that hill might be an old Indian camp . That is so interesting! Sometimes I do find indian tools around the creeks and rivers here!
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ericabelle
spending too much on rocks
Instagram acct: @erica_shoots_everything
Member since April 2021
Posts: 482
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Post by ericabelle on May 16, 2021 11:19:30 GMT -5
For me it looks like a rhyolite with varying degrees of hardness between the dark material and the grey material. It could easily be a metamorphic of an igneous rock or As to a tool, I'd pass on that. That sounds like a definite possibility. I know we have rhyolite in the area, but I'm not very good at identifying it. Is it a unusually heavy for its size? I'm used to handling lots of chert, but this seemed heavier.
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victor1941
fully equipped rock polisher
Member since November 2011
Posts: 1,958
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Post by victor1941 on May 16, 2021 11:43:02 GMT -5
Here is my guess based on something that I saw a long time ago. The material looks like it was layered, dried and cracks developed and the cracks filled with a harder material and the process was repeated. The softer material(lighter) shows more erosion in your example than the darker material.
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Post by RickB on May 16, 2021 14:13:55 GMT -5
Not an artifact.
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lookatthat
Cave Dweller
Whatever there is to be found.
Member since May 2017
Posts: 1,360
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Post by lookatthat on May 17, 2021 8:32:11 GMT -5
I think Victor is on the right track.
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ericabelle
spending too much on rocks
Instagram acct: @erica_shoots_everything
Member since April 2021
Posts: 482
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Post by ericabelle on May 17, 2021 13:06:29 GMT -5
victor1941 that makes a lot of sense. That would explain the strange indentations! Thank you!
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Post by rmf on May 30, 2021 12:08:39 GMT -5
ericabelle This looks like weathered cone-in-cone structure. this is caused by water coming up through fine sediments and bringing sediment with it causing a cone to form. Search for cone-in-cone structure on your browser and look for an image.
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ericabelle
spending too much on rocks
Instagram acct: @erica_shoots_everything
Member since April 2021
Posts: 482
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Post by ericabelle on May 30, 2021 17:23:10 GMT -5
rmf , I searched for images, and you are right! That really looks like the case here - thanks for your help! I'm going to enjoy reading about this.
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