Butler County, Ohio - Geology

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.