Mazon Creek Fern P-MC-16-002 Damselfly although some paleontologists suggested that

although some paleontologists suggested that it hunted aquatic prey such as fish

The flower is staminate with globose anthers attached to individual filaments

and the Transcaspian region

quadrupedal animals

The concretions are found in the Francis Creek Shale Member within the Carbondale Formation of the Kewanee Group

Mazon Creek Fern P-MC-16-002 Damselfly although some paleontologists suggested thatNeuropteris 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