Ancient beach ridges
A series of glacial lakes-precursers to Lake Erie-formed beach ridges across northern Ohio. Early trails followed the ridges, as do modern roads such as Detroit Road and Center Ridge Road. The map shows the abandoned beach ridges of glacial lakes Maumee, Whittlesey and Warren.
Source: Lake Erie and Lake St. Clair Handbook edited by Stanley J. Bolsenga and Charles E. Herdendorf, 1993.