Search results

==Colchester Coal and Francis Creek Shale== ...es had thick Francis Creek; however, many other mines having thick Francis Creek had high-sulfur coal (Gluskoter and Hopkins 1970)<ref>Gluskoter, H.J., and

|category6=Shale |tree2=Francis Creek Shale Member

* Archer, A.W., and E.P. Kvale, 1993, Origin of gray shale lithofacies (clastic wedges) in U.S. Midcontinent coal measures (Pennsylvan ...habica and A.A. Hay, eds., Richardson’s guide to the fossil fauna of Mazon Creek: Chicago, Northeastern Illinois University, p. 35–51.