Pay in 4 interest-free payments of $4.25 Learn more
Ships within 48 hours · Estimated delivery Jul 31 - Aug 5
The serrations on the mesial carina of the tooth extend one half of the distance from tip to base of the crown
the entire thickness contains Desmoceras and Bendanticeras and Pervinquieria
and African tropics
Hamites and many other fossils occur in the basal part
Mazon Creek Fern P-MC-16-024 Triassic The serrations on the mesialPecopteris sp. Carbondale Formation Middle Pennsylvanian Grundy County, Illinois Complete siderite nodule with a very well preserved fern frond. The Mazon Creek area fossils are found mostly in siderite concretions. The concretions are found in the Francis Creek Shale Member within the Carbondale Formation of the Kewanee Group. The best nodules are a by product of coal strip mining operations. The age of the fossil plants is Desmoinesian, Middle