The cache is located in the town of Big Rock... (Not Bedrock, thats
where Fred Flinstone lived).
Actually the town no longer exists, just this Historical marker
and the rock the town was named after. 
Big Rock
Natural features have often played a role in the naming of
communities.
One such settlement was Big Rock. Named after a massive
boulder,
this hamlet was located at the crossroads of present-day M-32
and Thornton Road.
Seth Gillet became the first postmaster in 1882. By 1902 a
general store
owned by Briley Township pioneer William Remington housed the
post office.
At that time a church and school, a grange hall, a sawmill and a
blacksmith shop
were also located in Big Rock. The post office closed in
1920.