The first picture are the barks of Lycopod clubmoss trees belonging to the Lepidodendron/Sigillaria species. The second picture is a Calamites stem probably Calamites suckowi.
Here is a sample of bark from my collection that I found at Fowlmead Country park near Deal, Kent. One of the two bits is different because I think it is a more mature sample of bark. My sample is Sigllaria mamillaris. Lepidodendron samples have a leave texture to them and are not as ridged when undistorted.
Hope this helps
The Fowlmead country park has one of the old tips open to hunt for fossils. There is a bit of work involved in digging out good chunks of rock but the ferns are well preserved and there is a good variety of plant types. It was the site of Belleshanger Colliery and they are mainly from the South Wales Middle Coal Measures Formation, South Wales Coal Measures Group. The seam worked was the Kent No. 6 Seam - H seam at Belleshanger.
There is the same material at the old hover port at Pegwell Bay as it was used for hardcore under the concrete. Some is now exposed as some of the concrete has been removed. This material is from Belleshanger and from Chislet Colliery and is from the same seam.
This is a group of seeds I found on my trip with the UKAFH. You can find other types of them if you are lucky. You do end up a bit mucky and looking like a miner but it is worth it a you can come across good sections of Lycopod bark. Good hunting.
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