Butler County, Ohio - Geology



  • The county is located in the "till plain" region of the state.
  • Bedrock underlying the county is primarily ordovician-age interbedded limestone and shale.
  • The area was covered with Wisconsinan ground moraine glaciers approximately 14,000 to 24,000 years ago.
  • Karst openings (sinkholes and caves resulting from erosion of the bedrock) are relatively uncommon despite the limestone and shale bedrock.
  • The three most common soil series types in Butler County are Miamian, Kokomo, and Eldean soils.
  • Butler County is located in Ohio soil region 4. Characteristics of the soils in this region are:
    • 98% of the soil in this region is greater than 40 inches deep over the underlying bedrock.
    • In 17% of the soil, the seasonal high water table lies less than a foot below the surface of the soil
    • 22% of the soil has a clay content of more than 27% in the topsoil
    • 20% of the soil has more than 3% organic matter in the upper 10 inches (good for agriculture)
    • 19% of the soil has more than 8% slope (this is not good for farming or building)
  • Seismographic events are relatively uncommon in the area. On January 11, 1983 at 9:41 pm, an earthquake centered near Hamilton! registered 2.0 on the Richter scale but was not felt by residents.
  • Between 1920 and 1940, 5 earthquakes occurred in the general vicinity of Hamilton! that were strong enough for area residents to feel.

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Last modified on Tuesday, 11-Sep-2018 01:01:01 MDT.