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Mineral Resources On-Line Spatial Data

St. Peter Sandstone

Coarse to fine, rounded, frosted sand grains; minor green shale stringers.
StateIowa
NameSt. Peter Sandstone
Geologic agePhanerozoic | Paleozoic | Ordovician-Early [Chazyan]
Original map labelOsp
CommentsApprox thickness 110 ft
Primary rock typesandstone
Secondary rock typeshale
Other rock types
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)
Minor
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 coverageAllamakee - Clayton - Dickinson - Dubuque - Winneshiek

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