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0 30 6015 Kilometers
1:3,000,000
600
600
Sea Level
1,200
1,800
2,400
3,000
3,600
4,200
MetersNW SEMICHIGAN BASIN
Cambrian
Ordovician
Silurian
Devonian
Mississippian
JurassicPennsylvanian Glacial deposits
Mes
ozoi
c
Jura
ssic
Middle
Late
Early
Late
Early
Late
Middle
Early
Silu
rian
Late
Pen
nsly
vani
anM
issi
ssip
pian
Dev
onia
nPal
eozo
ic
LOWERPENINSULABEDROCKGEOLOGY
PrecambrianPrecambrian
(transect below)
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