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LaPort City Chert

Predominantly chert with limestone and dolomite; minor shale and sandstone. Found in subsurface only.
StateIowa
NameLaPort City Chert
Geologic agePhanerozoic | Paleozoic | Devonian-Early
Original map labelDlp
CommentsApprox thickness 140 ft
Primary rock typechert
Secondary rock typelimestone
Other rock typesdolostone (dolomite); shale; sandstone
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Chemical > Chert (Bed)
Minor
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Map references
Hershey H. G. 1969, Geologic Map of Iowa: Iowa Geological Survey, scale 1:500K
Unit references
Hershey H. G. 1969, Geologic Map of Iowa: Iowa Geological Survey, scale 1:500K
Geographic coverageBlack Hawk - Buchanan

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=IADlp;0
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