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Llewellyn Formation Plant ID


Vin

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Hello everyone,

All of these were found in St. Claire, PA. Llewellyn Formation. Any idea what they are?

 

#1. Plant leaf of some sort?

#2. Scaley looking fossil?

IMG_20200802_190220.jpg

IMG_20200802_190400.jpg

IMG_20200802_190403.jpg

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#3- looks to be Stigmaria

#4 - Calamites

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" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

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#1 Difficult to ID from photo, longitudinal striations may indicate some calamite stem or cordaite leaf fragment, but there are more options possible here.

#2 could these be coal cleats, i.e. represent a lithological rather than biological feature?

#3 As Abyssunder said, Stigmaria, with were the "root-like" organs of lycophytes (Lepidodendron, Sigillaria, etc.), rather than of tree ferns

#4 As Abyssunder said,Calamites

#5 Could you annotate the photograph? What do you mean with segmented? Term suggests calamite, but I have difficulty seeing past the mineral staining on this photo.

#6 Stems, possibly a calamite, need to look for nodes to confirm. Alternatively, possibly some type of pteridosperm stems?

 

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Searching for green in the dark grey.

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  • 4 weeks later...

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