From Ohio History Central
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| caption = Ceramic rimsherd is an example of Adena Plain pottery. It was part of a fairly large jar with a slightly outward bending rim and a flat lip. The surface is plain with no decoration. It is very pale brown and dark gray in color. Item was excavated from Cowan Creek Mound in Vernon Township, Clinton County, Ohio.
<p>The Cowan Creek Mound was a conical burial mound located in Vernon Township, Clinton County, Ohio. Raymond Baby excavated the mound in the late 1940s. At the base of the mound, he uncovered a circular pattern of postmolds 45 feet in diameter. He found many small, thick fragments of charred bark around the postmolds and concluded that these features represented an ancient house that had been roofed with bark. This was the first discovery of a circular pattern of postmolds beneath a mound in Ohio.</p> <p>A radiocarbon date for the site indicated it was built at around 440 BC, placing it
in the Adena culture.</p>
<p>Baby thought the structure had been a dwelling that was burned down to be used as a place of burial. Later investigators think such Adena structures were specialized mortuary buildings used for funeral rites and burial.</p>