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noct.strix

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Welcome to the Forum. :)

 

The matrix looks like water worn limestone or dolostone. 

I agree, crinoid stems in cross section. 

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    Tim    -  VETERAN SHALE SPLITTER

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Yup, very nice ones! :)

" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

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I don't mean to disagree but,   I don't think its criniod its a petoskey stone they have really cool markings and patterns I have a bunch in my collection. will add a photo later....

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Crinoid stems eroded in section.

Grüße,

Daniel A. Wöhr aus Südtexas

"To the motivated go the spoils."

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@hndmarshall

 

Petosky stones are corals, and really look nothing like this.  :unsure: 

 

Petosky stone pictures.

Crinoid stem cross sections

 

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    Tim    -  VETERAN SHALE SPLITTER

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__________________________________________________
"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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1 minute ago, hndmarshall said:

not all are corrals but the major ones usually are and have a nice pattern but there are others...

000_0693.JPG

Technically, these are not Petosky Stones.  

These appear to be water worn cobbles, with horn corals or other corals, as well as crinoidal limestone.

Some people may call these  cobbles with fossils from the great lakes Petosky stones, but unless they are Hexagonaria percarinata, they are not technically  Petoskey stones. ;) 

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    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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well still could be criniod I guess but still referred to a petoskey stone by many beach combers....above is some I have bought online have others but would have to dig them out....still learning here.

 

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Try to compare. :)

 

s-l1600.thumb.jpg.5be7eee9f6a83794a122baf891152097.jpg

" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

My Library

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