Here’s a word lesson. Erratic: to lack a fixed course or uniformity; to wander or deviate from the ordinary. Now, let us apply that to Ohio’s geology, which is anything but ordinary.
If you need a reminder that the world is held together by stone, then consider Ohio’s basement. You cannot see it except in the long strands of bored-out cores that have been extracted from hundreds of feet below the earth’s surface. The basement is composed of sedimentary rock, settled and compressed at the bottom of what was once a deep ocean. That bedrock dates to about 570 million years ago, geologists say. It’s called Cambrian period stone, named after Cambria (which is now called Wales), where the stone type was first described and given a name around 1835.