Jump to content
Ramona

is "bowl like" structure part of fenestellan bryzoan anatomy?

Recommended Posts

Ramona

I keep finding rocks with these bowl-like structures on them, so I took one to examine more closely.  I cleaned it well with my vinegar/water solution and then started removing as much soft matrix as I could with a dental pick.  These bowl like structures have a fairly thick edge to them.  Once I took macro photos of them, I could see that they do seem to be comprised of fenestellan bryzoan fossils, although I believe I do see some crinoids, too (not sure if I included those in the photos).  I have been learning about the fenestellan bryzoan anatomy, but I am not sure where/if this fits in.  I will post photos of the "bowls" and the surrounding areas, where I have removed some matrix.  You may need to zoom in to see the tiny details.  Thanks for any information!  (Located in Huntsville, AL)

Ramona
 

IMG_9886-1low.jpg

Share this post


Link to post
Share on other sites
Ramona

Broader photo of the same area photographed above.

IMG_9888-2low.jpg

Share this post


Link to post
Share on other sites
Ramona

The other end of the same rock - more bowl like structures on the left end, although more segmented. 

IMG_9892-3low.jpg

Share this post


Link to post
Share on other sites
Ramona

A side shot of the rock, where I have removed some of the matrix.  Zoom in to see the tiny details. 

IMG_9893-4low.jpg

Share this post


Link to post
Share on other sites
Ramona

This is a close up of the "edge of the bowl".  It looks like fenestellan structures?

IMG_9892-3lowa.jpg

Share this post


Link to post
Share on other sites
Rockwood
10 hours ago, Ramona said:

A side shot of the rock, where I have removed some of the matrix.  Zoom in to see the tiny details. 

There are tiny crinoid bits in the rock. I suspect it could be described as crinoidal limestone.

There do seem to be some slight indications within the bowl shapes that may have formed on some sort of organic scaffolding. They show as slightly darker elements with a slightly different texture. It's difficult to tell just what they may be, but I doubt it was a fenestrate. It could easily be more like the rind of a concretion.

Share this post


Link to post
Share on other sites
Ramona
On 2/2/2020 at 4:54 AM, Rockwood said:

There are tiny crinoid bits in the rock. I suspect it could be described as crinoidal limestone.

There do seem to be some slight indications within the bowl shapes that may have formed on some sort of organic scaffolding. They show as slightly darker elements with a slightly different texture. It's difficult to tell just what they may be, but I doubt it was a fenestrate. It could easily be more like the rind of a concretion.

Thank you!  I have gone off and learned some about concretions now.  Fascinating!

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Recently Browsing   0 members

    No registered users viewing this page.

×