: About two miles north of Monroeville, Ohio is a area of concretions. These concretions contain the minerals: dolomite, calcite, celestine, baryte and quartz. These minerals occur as efflorescent mineral crusts on shale walls and pyrite is found in the shale as balls.
The area is locally know as Blue Bridge. View on Ohio Memory.
: SA1039AV_B11F10_023_001 Subjects
: Huron (Ohio); Rivers; Concretions. Places
: Monroeville (Ohio); Huron County (Ohio)