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Showing results for tags 'atoka formation'.
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These were fossils my dad found over 20 years ago I think and gave to me maybe 10 yrs ago. I had completely forgotten about them. My dad use to be a land man for an oil and gas company. So he traveled the area extensively trying to get leases to drill for gas. I believe they are from somewhere near Mansfield, Arkansas from the Atoka or McAlester formations, both of which are Pennsylvanian. Any my help with ID would be greatly appreciated. First Piece The longest blade is about 55 mm long by 13 mm wide. A close up of some of the blades on the left side. I think there are 2 varieties here, not sure if the arching one is like the ones in the center and to the left of it. The center one is the top side of the blade and the one to the left and arching one appear to be the underside of the blades. It’s cool to be able to see that much detail. Then there is a different variety on the top left corner. I’ll take some close ups of those and post in a bit. A pic of the right side a bit closer up. I think in this pic there are at least 3 varieties of ferns. The ones on the top right pointing downwards which may be the same as those on the top left above. Then the long blade in the center running vertically. I think it is the only one of its kind represented on this plate. Then at the bottom running mostly horizontally. I have no clue as to the genus or even group of Medullosans. If I had to guess I’d say Neuropteris for all 3, but it’s a wild guess. Second piece is an Annularia of some kind I believe. You can se the long slender stems and then many long, slender leaves, which appear to have numerous veins running the length of the leaf. They are all cross crossing each other so it’s a bit chaotic to try to isolate one cluster. This is the back side. It has a couple stems running across it. There is more stuff in between layers on both pieces.