Geologic units in Wayne county, Michigan

Detroit River Group (Middle Devonian) at surface, covers 15 % of this area: Detroit River Group
Lithology: dolostone (dolomite); limestone; sandstone
Sunbury Shale (Mississippian-Devonian) at surface, covers < 0.1 % of this area: Sunbury Shale
Lithology: black shale
Traverse Group (Middle Devonian) at surface, covers 24 % of this area: Traverse Group
Lithology: limestone; shale
Sylvania Sandstone (Early Devonian) at surface, covers 0.8 % of this area: Sylvania Sandstone
Lithology: sandstone; dolostone (dolomite)
Bedford Shale (Late Devonian) at surface, covers 5 % of this area: Bedford Shale
Lithology: shale; sandstone
Berea Sandstone (Late Devonian) at surface, covers 1 % of this area: Berea Sandstone
Lithology: sandstone; siltstone
Dundee Limestone (Middle Devonian) at surface, covers 22 % of this area: Dundee Limestone
Lithology: limestone; dolostone (dolomite)
Coldwater Shale (Mississippian) at surface, covers 0.3 % of this area: Coldwater Shale
Lithology: shale; limestone; dolostone (dolomite); sandstone; siltstone
Antrim Shale (Late Devonian) at surface, covers 32 % of this area: Antrim Shale
Lithology: black shale; limestone