Geology and History
The land that became Mason Co. was part of a seabed millions of years ago, and as a result, fossils can be found today in every cut along the county’s highways and in the excavations being done by a major local lime operation (see Geology). The limestone that formed from the ancient sea provided rich soil, later worked by American Indians. Prehistoric foundations and artifacts that have been uncovered reveal a sophisticated community at Fox Field in southern Mason Co.
Mounds and other evidence of prehistoric life are common. Prehistoric animals and later bison beat down a trail from the Ohio River to Central Kentucky through the saltlick at what is now Blue Licks, and it was this road that led the first white settlers to the area.
Above excerpted from page 583 of THE ENCYCLOPEDIA OF NORTHERN KENTUCKY THE UNIVERSITY PRESS OF KENTUCKY ISBN 978-0-8131-2565-7