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Caesar Creek Dam Emergency Spillway, Massie Township, Warren Co., Ohio, USA

Caesar Creek Dam Emergency Spillway, Massie Township, Warren Co., Ohio, USA
Latitude: 39°28'49"N
Longitude: 84°3'25"W
Caesar Creek is named after a former black slave living with the Shawnee in this area (ca. 1790-1800). The Creek was dammed in the late 1970s and an extensive spillway created. This spillway cut through Upper Ordovician strata (Arnheim, Waynesville, Liberty, and Whitewater Formations) - some of the most fossiliferous strata in Ohio.

While primarily known for fossils, there are minerals associated with the site. In particular, calcite in whole brachiopods (similar to those found near Georgetown, Ohio) and pyritized fossils (similar to those found in Sylvania, Ohio).

The spillway and adjacent road-cuts are open to collectors, but registration is required at the U.S. Army Corps of Engineers headquarters a mile or so north of the spillway. The headquarters has a neat museum, park, and bathroom facilities.

Mineral List


2 entries listed. 2 valid minerals.

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"The petrology of a composite vertical section of Cincinnatian Series limestones (Upper Ordovician) of southwestern Ohio"
WD Martin - Journal of Sedimentary Research, 1975

External Links

D. Shrake. "Excursion to Caesar Creek State Park in Warren County, Ohio: A Classic Upper Ordovician Fossil-collecting Locality" Fieldtrip guide. http://napc2009.org/wp-content/uploads/2009/06/caesar-creek-state-park-in-warren-county.pdf

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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