Pteridosperms and others; Llewellyn formation

[ixkr]

Went to a site in central PA today and collected some Llewelyn formation ferns and other Carboniferous plants. Second opinions on the following are appreciated!

 

1, I thought this is an Alethopteris but the leaves look like they can also be some immature Neuropteris with compound leaves with the leaves pressed together.

 

 

 

2. Is this Sigillaria bark?

 

 

 

3. Wasn’t sure if this is Lepidodendron bark. These crosshatched stem-looking prints are quite common at the site

 

4. is this a Calamite print?

 

 

 

5. I am fairly certain this is Neuropteris but just would like to be sure.

 

 

 

That’s all. All and any help is appreciated! Thanks in advance and let me know if scale is needed. 

 

 

[Rockwood]

2 Does appear to show the leaf scar pattern of a Sigillaria. It may be not be the outermost layer though. I think 3 - 4 represent the inner layers of Lycopsid cortical tissue. 

[ixkr]

18 hours ago, Rockwood said:

2 Does appear to show the leaf scar pattern of a Sigillaria. It may be not be the outermost layer though. I think 3 - 4 represent the inner layers of Lycopsid cortical tissue. 

Thank you! When cleaning and organizing my finds today, I found the following on the flip side of one of the pieces. This one has more pronounced circular leaf scar marks (typical for Sigillaria I believe? Lepidodendron’s leaf marks are more hexagonal?). Here is a side by side comparison with 2 to show the size difference. Different growth stages maybe?

[Rockwood]

4 hours ago, ixkr said:

Different growth stages maybe?

My understanding is that the layers of cortex beneath the growing surface had a pattern to them that was less well defined. As the trunk expanded with growth these outer layers were sluffed off. I've seen large boulders that appeared to be essentially a pile of the material.