Apologies, I was out looking for other kinds of permineralized material today and just as I was leaving the search area I found this sliver of material. For some reason I just can't get a good pic of it to convey the material better.
I do hope to get back there to search for more material but my thought is this is fern. Maybe I need to get a bit more daylight and a little further away.
2.5" length, 1" width, 3/4" tall