Mineral Resources
Online Spatial Data
Geology
by state
Michigan geologic units
Geologic units in Grand Traverse county, Michigan
Coldwater Shale
(Mississippian)
at surface, covers 47 % of this area
Coldwater Shale
Ellsworth Shale
(Late Devonian)
at surface, covers 41 % of this area
Ellsworth Shale
Antrim Shale
(Late Devonian)
at surface, covers 7 % of this area
Antrim Shale
Marshall Sandstone
(Mississippian)
at surface, covers 3 % of this area
Marshall Sandstone
Michigan Formation
(Mississippian)
at surface, covers 2 % of this area
Michigan Formation