Phgotographed by Michael P. Klimetz

Pennsylvanian

Francis Creek Shale

Mazon Creek

Will County

ILLINOIS

Laveineopteris

Phgotographed by Michael P. Klimetz

Pennsylvanian

Francis Creek Shale

Mazon Creek

Will County

ILLINOIS

Phgotographed by Michael P. Klimetz

Pennsylvanian

Francis Creek Shale

Mazon Creek

Will County

ILLINOIS