Publication, Utgave 14

A. T. Thick Alcona county Alpena anhydrite anticline Antrim Antrim shale appears argillaceous Argillaceous shale Bay City Berea black shale Blue clay Blue shale brine brisk eff brown limestone Brown shale buff calcareous calcareous shale cherty Coal Measures Coldwater Coldwater shale dark drab Dark gray Detroit River dolomitic limestone drift drilled driller Dundee Dundee Corniferous Dundee limestone Elevation feet in depth feet per mile feet thick Geological grained gray dolomite gray shale gypsum Hardpan Lake large residue Light gray limestone lime Lower Marshall Lower Monroe Manistee Marine City Michigan ness Niagara oil and gas oil or gas Pleistocene Port Huron pyrite quartz record Red shale Saginaw Salina salt beds samples sandrock sandstone sandy shale shaly slate slow eff Soapstone soft strata streaks struck surface Sylvania Traverse Hamilton Trenton Upper Marshall Upper Monroe violent eff white limestone white sandstone White shale yielded