Is this a fossilized horsetail

[Petrified solid]

[Fossildude19]

Sorry, but I don't think so - I am not seeing it.

[doushantuo]

With Tim, here.

You'd have to point out the relevant paleobotanical features to us.

[Petrified solid]

I apologize for being so vague . This is actually my back yard I have lots of small pieces of horsetail but I was actually wondering if the entire rounded areas was a large log

 

 

[Rockwood]

Tree sized (arborescent) horsetails are knowns as Calamites. It's hard to determine in this example, but most that show well defined ridges are actually internal molds or pith casts. They did not produce layered wood like other trees, but remained relatively hollow.

[Plantguy]

2nd picture looks to have some interesting textures and the darker band almost looks like carbonaceous plant material. Do you have any sharp clear images of that layer/area? 

 

Last 2 photos show you are on to some plant material--nice! Looks like a great place to hunt. You need to put a scale in photos or provide dimensions to help us figure sizes.

 

Bedding/weathered areas look a little loose/sketchy with possible sluff off/rock fall--be safe! 

 

Regards, Chris 

 

Should have added that the 1st photo doesnt strike me as Calamites but rather a sedimentary/weathering feature. Closeups of the rocks/layering with a scale may suggest otherwise. 

Those plants did get pretty big...10m common up to 30meters tall...

Here's a relatively small 20 cm long section of a find from Whitley County. 

Edited June 26, 2022 by Plantguy
added additional comments and photo

[Sjfriend]

Biggest horsetail I've found at my Alaska site is approximately 2.5cm wide and mostly flat (about .5cm across)