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Kato

Fusulinid specimen with unknown passengers

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Kato

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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Kato

Another view

image.thumb.png.13e98abc365e42512a56846b5da490d2.png

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Fossildude19

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

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Kato
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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DPS Ammonite

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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Fossildude19

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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daves64

Alien egg sacks. :whistle:

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Kato
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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DPS Ammonite
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. 

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Kato
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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