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Mineral Resources On-Line Spatial Data

Bayport Limestone

Bayport Limestone
StateMichigan
NameBayport Limestone
Geologic ageMississippian
Original map labelMb
CommentsSecondary unit description from USGS Geologic Names lexicon (ref. MI016): The Bayport limestone consists of sandy yellow limestones, cross-bedded white sandstone, and a little dolomite. Unit is 20 to 50+ feet thick. The Bayport is the top unit in the Grand Rapids group or series. Maximum thickness of the Bayport is about 37 m but in most places is 15 to 30 m thick. Unit is lithologically variable, but is predominantly carbonate. It also contains significant amounts of sandstone and minor quantities of shale, bedded chert, and evaporites.
Primary rock typelimestone
Secondary rock typedolostone (dolomite)
Other rock typessandstone; shale; chert; evaporite
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Minor
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Carbonate > Dolostone (Bed)
Incidental
Sedimentary > Chemical > Chert (Bed)banded chert
Sedimentary > Chemical > Evaporite (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Map references
Milstein, Randall L. (compiler), 1987, Bedrock geology of southern Michigan: Geological Survey Division, Michigan Dept. of Natural Resources, scale= 1:500,000
Unit references
Milstein, Randall L. (compiler), 1987, Bedrock geology of southern Michigan: Geological Survey Division, Michigan Dept. of Natural Resources, scale= 1:500,000
USGS Geologic Names Lexicon (GEOLEX)
Geographic coverageBarry - Eaton - Huron - Ingham - Ionia - Jackson - Kent - Lake - Missaukee - Muskegon - Newaygo - Ogemaw - Ottawa - Roscommon - Tuscola - Wexford

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