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Fusulinid specimen with unknown passengers


Kato

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This is from the middle Pennsylvanian. Appears to be fusilinids in pink-red sandstone with several orange passengers onboard. They all appear to be centralized to a broken open fusilinid. Only one big enough to really get a couple macro shots of.

 

Any ideas on the orange item? I didn't want to put too much pressure on it, but definitely quite hard (scratch resistant to a needle).

 

33mm x 25mm" as pictured. Orange unknown is 2mm.

image.thumb.png.47b0e242a35c462bf49056c0f037a7ee.png

 

image.thumb.png.d0cd4c57ae49f5304159453182a83096.png

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Can't help, but wanted to say great photos! :) 

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    Tim    VETERAN SHALE SPLITTER

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13 minutes ago, Fossildude19 said:

Can't help, but wanted to say great photos! :) 

Thank you...I wish they all came out so nicely.

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Put some acid on the rock and the orange piece. What happens? I wonder if your rock is carbonate. The orange might be calcite or silica that has replaced or filled a fossil (bryozoa?) If the orange is silica, it sort of reminds me of the ~ 300 million year old Pennsylvanian Naco Formation from Arizona that is full of red silicified fossils.

 

Can you show us an end on view of the orange tubes?

 

Here is a great resource for US Pennsylvanian fossils from the DPS  website. I especially like the “Pictorial Guide to Upper Pennsylvanian Fossils”  by Ben Neuman, in conjunction with the Dallas Paleontological Society: 

 

https://www.dallaspaleo.org/Jacksboro-Study-Group

 

 

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My goal is to leave no stone or fossil unturned.   

See my Arizona Paleontology Guide    link  The best single resource for Arizona paleontology anywhere.       

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Just a thought: 

Is it possible this is some sort of fecal pellet? 

I'm not seeing anything with the longitudinal furrows in any of the foraminifera photos I am seeing on-line.  :headscratch::zzzzscratchchin:

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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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1 hour ago, DPS Ammonite said:

Put some acid on the rock and the orange piece. What happens? I wonder if your rock is carbonate. The orange might be calcite or silica that has replaced or filled a fossil (bryozoa?) If the orange is silica, it sort of reminds me of the ~ 300 million year old Pennsylvanian Naco Formation from Arizona that is full of red silicified fossils.

 

Can you show us an end on view of the orange tubes?

 

Here is a great resource for US Pennsylvanian fossils from the DPS  website. I especially like the “Pictorial Guide to Upper Pennsylvanian Fossils”  by Ben Neuman, in conjunction with the Dallas Paleontological Society: 

 

https://www.dallaspaleo.org/Jacksboro-Study-Group

 

 

I did try vinegar on it with no reaction. 

 

Here's the best I can do for an end view. Note that it is tapering towards the person viewing.

image.thumb.png.a1e49972e28fe7cd134791904ff1dd0a.png

 

here's an opposite side than originally provided

image.thumb.png.839293dfe6ae6b4e4d44d97927418698.png

 

After some searching I have pseudo-convinced myself that it is silica that has infilled the fusulinid chambers

 

Fusulinella.jpg

 

ectioned reconstruction of Fusulinella, from here. Labels: нк = primary chamber, са = septal folds, с = septa, сб = septal furrows, х = chomata, у = septal aperture, т = tunnel.

 

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3 minutes ago, Kato said:

I did try vinegar on it with no reaction. 

 

Here's the best I can do for an end view. Note that it is tapering towards the person viewing.

image.thumb.png.a1e49972e28fe7cd134791904ff1dd0a.png

 

here's an opposite side than originally provided

image.thumb.png.839293dfe6ae6b4e4d44d97927418698.png

 

After some searching I have pseudo-convinced myself that it is silica that has infilled the fusulinid chambers

 

Fusulinella.jpg

 

ectioned reconstruction of Fusulinella, from here. Labels: нк = primary chamber, са = septal folds, с = septa, сб = septal furrows, х = chomata, у = septal aperture, т = tunnel.

 

I think you are right because of the tapering. 

My goal is to leave no stone or fossil unturned.   

See my Arizona Paleontology Guide    link  The best single resource for Arizona paleontology anywhere.       

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2 minutes ago, DPS Ammonite said:

I think you are right because of the tapering. 

Thank you for pointing me in a direction to find the fusulinid diagram.

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