Abbreviated record for specimen 15629 Basic Information Determination: Calamites suckowi Brongniart Previously: none Type Status: Figured In: Janssen, 1939, p. 79, fig. 60Langford, 1958, p. 31, fig. 21 Locality: Will County, Illinois Geologic Unit: Francis Creek Shale Additional Information Images: medium (150 dpi, 94.1KB)large (600 dpi, image not available) Catalog Data: show full record