This is a portion of a scanned highway map of Warren County, in southwestern Ohio.
My dad once told me a story about seeing a Warren County map back in the 1950s or 1960s that labeled a large glacial erratic boulder near Lebanon, Ohio as a meteorite. I accepted what he said, but was always interested in verifying it.
The site is near modern Interstate-71, southeast of Lebanon, Ohio. The boulder is behind an old one-room school called "Rock School House".
See:
www.flickr.com/photos/cincystevenson/3383428875
See:
www.flickr.com/photos/cincystevenson/2543427435
To find out if such a map was available, I contacted the Warren County engineer's department, which is part of the county government. I was surprised and pleased to find out that they knew exactly what I was talking about and provided a ready-made scan of the map. The title of the old map is "Warren County Highway Map 1958".
In reality, the large boulder is gneiss, a high-grade metamorphic rock. It was transported from Canada to Ohio by glaciers during the Pleistocene Ice Age.
