General Contents - Grundy-Mercer NB #2: Stratigraphy - Bethany Falls, Henrietta, Hertha, Missouri Group, Mystic, Pawnee, Pennsylvanian, Pleasanton, Rhomboidal Limestone, Winterset: Minerals - clay, fire clay, gypsum, salt: Lithologies - coal, conglomerate, drift, drift clay, limestone, sandstone, shale, slate, soapstone: Mines/quarries - burned ballast plant, coal shaft, limestone quarry; American Ballast Co. Princeton Plant: Paleontology - Fossiliferous shale, limestone. Bryozoans.: Hydrology - Springs; iron spring; Maddon, Shinn springs. Wells noted; iron, laxative, saline, epsom salt, MgSO4, CaSO4 water. Named streams noted.: Structure - Joint strikes. Dips noted. Small syncline.: Oil/gas - [none noted]: Karst - [none noted]: Measured [...]