Erected 1923 by the citizens
of the county to commemorate
the organization in 1840
of Iosco County
and the establishing in 1856
of the first Post Office in the
county with Gideon O. Whittemore
as Postmaster.
"History is the essence…
This area is named after a variety of gypsum, discovered offshore by Douglass Houghton in 1837. Prospectors soon began searching for other gypsum deposits, and this quarry was opened in 1862 by B. F. Smith. Used at first as fertilizer and as an in…