Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
6/24/97 Location (23A). New locality
Iowa 151 roadcut. Brainerd Shale +
overlying Silurian
See Witzke, B.T. & E.F. Glemster 1987,
n. Ord. Magnobeta Fm in the Graf area
eastern Iowa. Geol.Soc.
Near Dubuque airport.