Jump to content

0lderthandirt

Recommended Posts

Arizona, redwall limestone, Mooney member, Mississippian. 

I've found several of these and I'm just not sure what's going on here. Looks like fossilized worms eating away at the brachiopod but now I'm thinking the tubular structures are fossilized guts. Any thoughts or other possibilities would be appreciated, thank you. 

DSC_0008.JPG

Will your next answer to my question be no? 

Link to comment
Share on other sites

Not guts.  Looks like eroded chert.  or possibly silicified worm burrows in the sediment that infilled the shell.  The most preservable "guts" in a brach is the brachial apparatus, which looks like a pair of helicoils on each side.  None seen here.

----------------------------------------------------------------------------------------------------------------------------

Arizona Chris

Paleo Web Site:  http://schursastrophotography.com/fossiladventures.html

Link to comment
Share on other sites

40 minutes ago, Arizona Chris said:

The most preservable "guts" in a brach is the brachial apparatus, which looks like a pair of helicoils on each side

I thought this might be the helicoils in a broken down collapsed state.  But maybe not. They are all about same size and hollow,  as seen under magnification here.  Thanks for your suggestion. 

20170918_150415.jpg

Will your next answer to my question be no? 

Link to comment
Share on other sites

looks like pieces of broken exterior spines to me.

"Absence of evidence is not evidence of absence"_ Carl Sagen

No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go.

" I think, therefore I collect fossils." _ Me

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes

"can't we all just get along?" Jack Nicholson from Mars Attacks

Link to comment
Share on other sites

Based on what of learned of these fossils so far, it is probably a product of diagenesis (something akin to beekite). 

“...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin

Happy hunting,

Mason

Link to comment
Share on other sites

39 minutes ago, Herb said:

looks like pieces of broken exterior spines to me.

Looking at another similar  brachiopod I agree it does look like broken spines 

20170918_184332.jpg

Will your next answer to my question be no? 

Link to comment
Share on other sites

It does kinda look like serpulids, but I don't believe they had evolved yet, and microconchs are spiral I think...

“...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin

Happy hunting,

Mason

Link to comment
Share on other sites

14 minutes ago, WhodamanHD said:

It does kinda look like serpulids, but I don't believe they had evolved yet, and microconchs are spiral I think...

I don't know that sepulids are in my area but the pics from a quick Google search sure look like the hollow tubes. I'll have to some of my other ones. Thanks

Will your next answer to my question be no? 

Link to comment
Share on other sites

many brachiopod spines are hollow also.

"Absence of evidence is not evidence of absence"_ Carl Sagen

No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go.

" I think, therefore I collect fossils." _ Me

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes

"can't we all just get along?" Jack Nicholson from Mars Attacks

Link to comment
Share on other sites

12 hours ago, Herb said:

many brachiopod spines are hollow also.

I just googled that, very interesting! 

Will your next answer to my question be no? 

Link to comment
Share on other sites

kooks like a Mississippian productid brachiopod

pseudoinfaunal.gif

"Absence of evidence is not evidence of absence"_ Carl Sagen

No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go.

" I think, therefore I collect fossils." _ Me

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes

"can't we all just get along?" Jack Nicholson from Mars Attacks

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...