This geologic formation with fossils dating back to the Carboniferous period was originaly called what by many Lawrence residents?
Oread Limestone: The Oread Limestone is a geologic formation of the Shawnee Group exposed in Kansas, Nebraska, Missouri, Oklahoma, and Iowa. Oread Limestone:  The type locality is Mount Oread within Lawrence, Kansas. Oread Limestone:  It preserves fossils dating back to the Carboniferous period. Mount Oread: Mount Oread is a hill in Lawrence, Kansas upon which the University of Kansas is located. Mount Oread:  The hill was originally called Hogback Ridge by many Lawrence residents until the Oread name was adopted in 1866.
Hogback Ridge