From Ohio History Central

<img width="370" height="310" title="Image of conglomerate" alt="Image of conglomerate" src="images/naturalHistory/rocks/conglomerate.jpg" />

Conglomerate is similar in structure and appearance to sandstone. However, the grains of quartz and rock debris are larger than sand particles.

In Ohio this kind of sedimentary rock also is of Late Paleozoic age, and occurs mainly in the eastern half of the state.

As with sandstone, conglomerate is one of Ohio’s industrial rocks.


  • Coogan, Allan H. Ohio’s Surface Rocks and Sediments; Chapter 3 in Fossils of Ohio, edited by Rodney M. Feldmann; Ohio Geological Survey, Bulletin 70, 1996.
  • Pough, Frederick H. A Field Guide to Rocks and Minerals; Houghton Mifflin, Boston, MA; 1976.
  • Sorrell, Charles A. Rocks and Minerals; Golden Press, New York, NY; 1973.
  • Wolfe, Mark E., compiler 1997 Report on Ohio Mineral Industries; Ohio Division of Geological Survey; 1998.

See Also