Calamites?

[Fullux]

Howdy all,

 

Recently recieved this piece. Found in Laurel County, Kentucky. Was described as Calamites, which I agree with, but I'm wondering if anyone could tell me anything more about it.

[DPS Ammonite]

That is an internal mold of the woody part of a horsetail like reed; that is the filling of the space once occupied by the pith by sediment. It is sometimes called a pith cast.

[Rockwood]

2 hours ago, DPS Ammonite said:

That is an internal mold of the woody part of a horsetail like reed; that is the filling of the space once occupied by the pith by sediment. It is sometimes called a pith cast.

Sorry, but I can't go along with calling Calamites a reed. Reed like maybe, but it was an arborescent sporophyte unrelated to grasses. 

[DPS Ammonite]

4 hours ago, Rockwood said:

Sorry, but I can't go along with calling Calamites a reed. Reed like maybe, but it was an arborescent sporophyte unrelated to grasses. 

Reed like is more my intent. Thanks.

[Fullux]

9 hours ago, DPS Ammonite said:

That is an internal mold of the woody part of a horsetail like reed; that is the filling of the space once occupied by the pith by sediment. It is sometimes called a pith cast.

Would this be composed of the original sediment in?

[Rockwood]

Yes. That which filled the cavity. The actual plant body has not been preserved. It's the most common way that these are seen.