INDUSTRIAL MINERALS AND METALS OF ILLINOIS

LIMESTONE

Kinds of Limestone

Formation of Limestone and Dolomite

Uses of Limestone and Dolomite

Quarries

Location of Limestone Deposits

METALLIC ORES AND FLUORSPAR

Lead and Zinc

Fluorspar

Origin of Illinois Ore Deposits

Illinois as a Mining State

SILICA SAND

Silica Sand Industry

Studies of the St. Peter Sandstone

GRAVEL AND SAND

Formation of Gravel and Sand Deposits

Studies of Glacial Deposits

Principal Commercial Sources of Sand and Gravel

Composition

Uses of Sand and Gravel

Production of Sand and Gravel

SILICA (TRIPOLI) AND OTHER MINERAL MATERIALS OF EXTREME SOUTHERN ILLINOIS

Silica (Tripoli)

Chert and Chert Gravel

Ganister

Studies of Southern Illinois Materials

Sands of Extreme Southern Illinois

CLAY AND SHALE

Early Uses in Illinois

Clay and Shale Deposits

Clay Minerals

Studies of Clay and Shale

How Bricks Are Made

PEAT

OTHER MINERAL RESOURCES

Gypsum and Anhydrite

Feldspar-Bearing Sands

Brines

Oil Shale

Sandstone

Barite

Greensand

Marl

Tufa and Travertine

Pyrite and Marcasite

Uranium

Iron Ore

Transcriber’s Notes