O'Hara Township Community Park - Prehistoric

O'Hara Township Community Park - Prehistoric. . It took a lot of clams (among other marine invertebrates) to make up the Ames Limestone bed, which extends westward into Ohio and eastward through Pennsylvania. Evidence of the vastness of the sea is shown in the speculative map. , This map at left is based on a speculative view of Pennsylvania around 300 million years ago by the Pennsylvania Geological Survey. The theory is that the two river deltas shown might have deposits the rocks of O’Hara Township. , The above map from the Pennsylvania Geological Survey shows the old river channels in our area. An ancient “oxbow” river bend was located where Powers Run flows today. , Various tools hand shaped by knapping found at the Allegheny County Workhorse Farm, formerly located in the eastern portion of O’Hara Township. Access the O’Hara Township website for links to knapping videos… www.ohara.pa.us, Clovis point , 10,000 - 8,000 B.C., Knapped flint points , 8,000 - 6,000 B.C. , Grooved axe , 4,000 - 1,000 B.C., The Human Imprint , Human Habitation in O’Hara Township goes far beyond the start of records area history (approximately 1,740 A.D.). Studies at the Meadowcroft Rockshelter in neighboring Washington County have found evidence of a campsite for prehistoric hunters and gatherers which dates to at least 19,000 years ago. As archeological investigations continue, evidence of human occupation goes deeper into the past. Peoples living in our area left no images such as those shown below from father up the Allegheny River in Venango County. Only their tools that were collected at the Workhouse Farm (today’s RIDC Park) survive.