Sigillaria?

[GuineaPoliceman]

Korkinsky Coal Mine/ Chelyabinsk region/ Russia

[Tidgy's Dad]

Lovely piece. 

i think you're right! 

[piranha]

counter septaria figure from:

 

Seilacher, A. 2001

Concretion morphologies reflecting diagenetic and epigenetic pathways.

Sedimentary Geology, 143(1-2):41-57

 

[TqB]

34 minutes ago, piranha said:

counter septaria

 

Agreed, very good specimen.

[TqB]

And as @abyssunder pointed out on page 5 of this classic thread: http://www.thefossilforum.com/index.php?/topic/70152-we-cant-figger-this-one-out-solved-counter-septarian-structures/&page=5

(Originally from this thread:http://www.thefossilforum.com/index.php?/topic/64412-looking-back-at-one-of-my-older-fossils-distorted-root-or-siderite-nodule/)

 

 

 

[abyssunder]

Yup, nice specimen of counter septaria!

[GuineaPoliceman]

Thank you very much

[GuineaPoliceman]

Hello everyone/ What do you think about this?  It seems like a piece of wood. The same place

Edited October 17, 2018 by GuineaPoliceman

[ynot]

Interesting rock.

Would like to see some good close up pictures of the top and sides.

I do not see petrified wood in this rock.

[GuineaPoliceman]

Back side scan. All sides are covered with white coating.  I will try to make better quality photos in the morning

Edited October 17, 2018 by GuineaPoliceman

[piranha]

Maybe just a coincidence but this one looks similar to the morphology of: Megaphyton  (image from: Bruno Vallois - French Paleobotany Forum)

 

[fifbrindacier]

If this is a megaphyton, that would be great !

[GuineaPoliceman]

Some better quality photos

[GuineaPoliceman]

[GuineaPoliceman]

On a geological forum I found out most likely it is a boudinage  structures or  some kind of geological formations.  I hope you will understand me/ 

[abyssunder]

It gives me a geological vibe, maybe with a slickenside pattern on one side.