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Lillian

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A few months ago I was helped here to identify a clam fossil and now near the same area I have found  this.  It doesn't match any images that I have found searching.  Thank you.

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Where was the item found?

 

    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  

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"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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In Central Illinois.  We dug a pond last year and I am finding a lot of interesting items in the mostly clay dirt.  A few months ago I found a crystallized clam, rocks with shell fossils in them and an Indian jewelry bead made from a stone.

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Can we narrow it down to a county?

    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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It looks like a possible astylospongiid sponge.  AstylospongiaCarpospongia, Caryospongia, are all reported from the Ordovician of Illinois.

 

This excellent paper has a bunch of similar examples for comparison:

 

Rhebergen, F., & Von Hacht, U. (2000)

Ordovician erratic sponges from Gotland, Sweden.

GFF, 122(4):339-349   PDF LINK

image.png.a84de26dad44fb03836a743755df237c.png

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That looks like a good match, Scott. 

Great work!

 

 

    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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You guys are the best!  I wish I had your knowledge.  My erratic sponge is on display with my other items.  Can't wait to find find more.

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14 minutes ago, Lillian said:

You guys are the best!  I wish I had your knowledge.  My erratic sponge is on display with my other items.  Can't wait to find find more.

 

 

'Erratic' only refers to glacial deposition of the sponges found in Sweden.

 

image.png.a84de26dad44fb03836a743755df237c.png

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8 hours ago, piranha said:

 

 

'Erratic' only refers to glacial deposition of the sponges found in Sweden.

 

It also has a much broader definition having to do with the distance that glaciers have displaced any rock from it's origin.

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One of the standard depictions of European erratic transport

Carpospongia globosa(weathered specimen) looks like a good bet?

Sometimes the morphology of the megascleres is more informative than outer appearance,BTW

(vide AND fide v. Hacht,Reitner et al)

Glacial transport(sometimes with multiple reworking) AND frost are causes of secondary fragmentation,truncation,etc

BTW:

Show Us Your Sponges - Page 3 - Member Collections - The Fossil Forum

www.thefossilforum.com › Fossil Discussion › Member Collections
  1.  
Vertaal deze pagina
19 okt. 2011 - Hope I can get it as pdf. ... Five specimens of Aulocopium aurantium, same deposits as previous sponges, also Ordivician in age. These are ...

evis.jpg

 

 

 

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Looking at the Show us your sponges from page 3 - is that what this is too?  I found this in the same area.   I thought it was a bone.

 

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