Pennsylvanian Naco Fm. “Wood”

[DPS Ammonite]

I have found some Pennsylvanian silicified “wood” from the lower part of the (~207 mya) Naco Formation in Arizona. This is the first recorded instance of likely plant material from the Naco. The formation is all marine in the section that I found it in and has lots of crinoids and brachiopods. One piece has some slight plant like internal texture with isolated circles and curved hash. Photo of side view of 90 mm wide piece with calcite rhomb molds.
 

Most of the wood from that time had distinctive exteriors such as Calamities, Lepidodendron and Sigillaria. Any idea of what my pieces of wood might be? Could they be internal pieces of above mentioned varieties without the distinctive texture? Could it be a tree fern such as Psaronius?
@paleoflor

 

Attached picture of single piece on a blue zippered notebook is about 185 mm long. 

 

Edited August 30, 2020 by DPS Ammonite

[Rockwood]

1 hour ago, DPS Ammonite said:

Could it be a tree fern such as Psaronius?

That's where my wager would go.

[paleoflor]

Not sure what to make of these photographs, sorry.