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DE&i

Much Wenlock coral

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Tidgy's Dad

Very weird! 

And very, very nice. :)

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Rockwood

Are you quite certain this is not a lobolith ?

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Innocentx
31 minutes ago, DE&i said:

the colony looks to have possibly grown around a crinoid stem

Or maybe a small horn coral.

This is a pretty cool example you have because it shows how it anchored itself.

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JohnBrewer
15 minutes ago, Rockwood said:

Are you quite certain this is not a lobolith ?

Mine or Darren’s? Or both? 

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Raggedy Man

I have several examples from the Waldron Shale(silurian) in Indiana, USA

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DE&i
On 12/8/2018 at 3:15 PM, JohnBrewer said:

I’ve seen similar at Wren’s Nest

 A433D6E4-C5FB-417E-BA87-2B13237F8AD7.thumb.jpeg.909c7f5aa78d9db9e009312c61c4251c.jpeg

That's good to hear @JohnBrewer I'm pleased another UK chap had something similar... Intriguing aren't they. 

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Rockwood
20 minutes ago, JohnBrewer said:

Darren’s

Original post.

 

10 minutes ago, Tidgy's Dad said:

There are several species of Favosites found in the Wenlock Limestone. 

John's one on the left is probably Favosites gothlandicus forbesii, the most common domed species with roughly equal sized zooecia found at Wren's Nest. 

The others I'm not so sure about. 

 

Is the circular base a common structure to the colony ?

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Tidgy's Dad
1 minute ago, Rockwood said:

Original post.

 

Is the circular base a common structure to the colony ?

If you mean the original post, the circle that looks hollow, I've not seen that before. Some species of Favosites are encrusting, maybe this has encrusted an echinoderm? No idea. 

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Rockwood
18 minutes ago, Tidgy's Dad said:

If you mean the original post, the circle that looks hollow, I've not seen that before. Some species of Favosites are encrusting, maybe this has encrusted an echinoderm? No idea. 

Looks like it failed geometry too. :wacko:

I still think lobolith should be on the table.

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abyssunder

A longitudinal median cross section of one of the many specimens may lead to a clear understanding of what they are.

If there are chambers, then is Lobolith, otherwise not.

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abyssunder
1 hour ago, Raggedy Man said:

I have several examples from the Waldron Shale(silurian) in Indiana, USA

Can you post one for comparative purpose, please?

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Raggedy Man
46 minutes ago, abyssunder said:

Can you post one for comparative purpose, please?

Yep! Ill be home in a little bit. Ill take pic and post soon.

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Raggedy Man

Not where I thought it was so ill have to look in other boxes i have for my over flow. Ill post soon if I find them. Fairly certain they're just pieces of crinoid stem though.

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Raggedy Man

Here is my specimen. As I said im sure mine is a crinoid stem segment. Measurements are in cm.

 

20181209_132602.thumb.jpg.20dede00e6eefa517b403f8cc3062bb1.jpg

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abyssunder
55 minutes ago, Raggedy Man said:

Here is my specimen. As I said im sure mine is a crinoid stem segment. Measurements are in cm.

 

20181209_132602.thumb.jpg.20dede00e6eefa517b403f8cc3062bb1.jpg

 

Thank you for the picture!
It's clear that in your photo is an attachment base to a possible crinoid stem, considering the five-fold symmetry of the lumen.
Can you take a shot of the opposite side ?

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Raggedy Man
23 minutes ago, abyssunder said:

 

Thank you for the picture!
It's clear that in your photo is an attachment base to a possible crinoid stem, considering the five-fold symmetry of the lumen.
Can you take a shot of the opposite side ?

20181209_143048.thumb.jpg.d2660e9a3eb7a48dcb15be2abfcc1dd5.jpg

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Rockwood

It does appear that these corals disliked geometry as much as they liked crinoid stems to settle on.

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DE&i
21 minutes ago, Rockwood said:

It does appear that these corals disliked geometry as much as they liked crinoid stems to settle on.

Totally agree with you there 

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abyssunder
1 hour ago, Raggedy Man said:

20181209_143048.thumb.jpg.d2660e9a3eb7a48dcb15be2abfcc1dd5.jpg

Thank you!

 

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abyssunder

It's intriguing to see patterns  on the surface somehow resembling the plate structure of loboliths, even they are not  terminal, but intermediate elements of a crinoid stem, and that might be the case why some of them have one opening and others have two.

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Rockwood
5 minutes ago, abyssunder said:

It's intriguing to see patterns  on the surface somehow resembling the plate structure of loboliths, even they are not  terminal, but intermediate elements of a crinoid stem, and that might be the case why some of them have one opening and others have two.

Intermediate elements of the stem !

Didn't see that one coming.

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abyssunder
42 minutes ago, Rockwood said:

Intermediate elements of the stem !

Didn't see that one coming.

I'm referring to what is sketched below, evidently the holes are not in opposite sides. ;)

 

5c0d9974870dc_Fig_12.thumb.jpg.500cef3ef1f150a61f996d08d167ecc7.jpg

excerpt from Haude et al., 2014

 

 

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