Geology of Ohio: Episode Two – Caesars Creek

To start off on this topic I’ll give some background information about this National Park located about five miles east of waynesville Ohio Caesars Creek came into being in 1971 when the Army Corps of Engineers erected a dam to control flooding in the valley the emergency overflow control spillway is where much of the geology of CJ’s Creek can be found the channel exposes prime 445 million year old order vision outcrop with an abundance of fossils but we don’t need again to that just yet first let’s look into the depositional environment and the time of the order Bishan let’s have a visual here we see Gondwana off to the lower left drifting toward the pole in the mid-latitudes we see Laurentia Avalonia and baltic a’ around four hundred forty-five million years ago the United States as we know it now was near the southern tropical attitudes and dominated by warm shallow oceans and a prime location for flourishing life the Iapetus ocean began to close and brought North America and European continents together known as the Taconic orogeny this event formed a series of island arcs and mountain chains just east of Ohio which not preserve a treant life we can view from Alabama to Newfoundland ordinarily Susan’s Creek would not exist and would be buried deep beneath the surface however we are thanks to tectonic activity that created the Cincinnati arch the arch is anti-klan old geologic structure that started forming somewhere around four hundred million years ago heavy erosion ate away at the uplifted material and exposed the Ordovician rocks beneath uplift and erosion continued through the late Pennsylvanian leaving the area as we now see it the best visual depiction of the arch is this display I found from the Geo fair notice the anticlinal structure and how it’s been truncated at the top leaving the younger deposits around the center basin okay and now for my personal favorite Caesars Creek attribute fossils you find them everywhere that are literally scattered across all surfaces many visitors often pass up collecting the most common fauna such as brachiopods or corals and go for trailer bites instead although they can be found trailer bites are pesky to find at times and often require diligent work as many of them are as tiny as a bee bee I won’t get into any specific descriptions but here are just a few of the many common species found here during your visit don’t forget to stop by the visitor center especially if you want to collect fossils you must obtain a collector’s permit free of charge and displayed in the window of your vehicle please also note that visitors are not permitted to take any samples larger than the palm of their hand and that the use of tools such as hammers or chisels is strictly forbidden good luck on your search and have a wonderful geologic day

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