Coal Block coals Cannel coal Chemical properties of coal Coal balls: preservers of organisms that lived in ancient swamps Coal gasification: a source of clean energy Coal liquefaction Composition of coal Distribution of coal in Indiana History of coal mining in Indiana Low-sulphur coal Methane in coal Methods of mining coal Peacock coal Physical properties of coal Surface-mined land in Indiana Underground Coal Mining in Indiana Microfossils of the Salem Limestone Salem Limestone - carving and sculpture Salem Limestone - milling Salem Limestone - its origin in the Salem Sea Salem Limestone - quarrying Salem Limestone - venerable veneer Geochemistry/Geophysics Acid rain: environmental problem of industrialization Atomic clocks measure geologic time Computers in geology Earth magnetism: a tool for subsurface studies Fluid inclusions: geologic thermometers Geologic field mapping: grassroots geology helps solve surface problems and find mineral deposits Geological Survey coring program Isotopes: tiny atoms tell stories eons old Microanalyses by electrons: the ultimate chemist Scanning electron microscope: geologists' big eye on the ultrasmall Well logs: the rock record on paper When white is right Geomorphology Anderson Falls Bear Creek Canyon and Portland Arch Bluespring Caverns: a unique system of Hoosier caves Bluffs of Beaver Bend: a scenic feature of Martin County Squire Boon Caverns: site of historic Boone's Mill Brown County State Park: land of scenic hills, ridges and valleys Cataract Falls Clifty Falls State Park Microanalyses by electrons: the ultimate alchemist Eyeless fish in Indiana caves Glacial lake flatwoods Hanging Rock: A relic of ancient seas Harrison Spring: One of the largest in the Midwest Hemlock Cliffs Indiana's region of Karst topography Kentland Dome: Geologic enigma Klintar: Ancient marine reefs of the Wabash Valley The Knobstone Encarpment: Scenic Hoosier landform Lost River: Ghost stream of southern Indiana Marengo Cave: One of Indiana's most beautiful caverns McCormick's Creek: Indiana's first state park Mineral waters and health resorts in Indiana The Ohio River Story - Part I The Ohio River Story - Part II The Ohio River Story - Part III The Ohio River Story - Part IV The Ohio River Story - Part V Oil from troubled waters? Pine Hills Nature Preserve and the Devil's Backbone Pokagon State Park: Ice age legacy Sand dunes of Southern Indiana Seven pillars of the Mississinewa: Scenic Hoosier landform Shades State Park: A missing part of the geologic story Spring Mill State Park Standing rocks: Ancient erosion remnants Turkey Run State Park: The power of erosion Turtle Rock (Pulpit Rock, Rostrum Rock) Versailles State Park Williamsport Falls (Dry Falls) Wyandotte Cave Historical Bonneyville Mill: One of northern Indiana's historic gristmills Buhrstones: Grain grinders of pioneer mills Burton Tunnel: One of Indiana's longest railroad tunnels Greene County's railroad viaduct: Third largest in the world Indiana mineral wool helps save energy Indiana's glass sand industry Lime kilns: Relics of one of Indiana's historic mineral industries Natural cement: Pioneer Hoosier mineral industry New Harmony: 19th Century center of culture and science Old mill at Spring Mill State Park Pioneer brickmaking in Indiana Portland cement: Rediscovery of ancient Rome's hydraulic cement Tunnel Mill: One of Indiana's historic water mills Reuben Wells: Hoosier locomotive of distinction Industrial Minerals Indianite: Hoosier rock with a past Legendary ore deposits of Indiana Lightweight aggregate Marl Natural molding sand: Historic Hoosier mineral resource The New Albany shale: Source of fuel for the future? Peat moss from the Ice Age lakes and swamps Sand and gravel: Gift of the Ice Age glaciers Underclay: A once-important Hoosier mineral resource Zinc: Potential Hoosier mineral resource Oil and Gas Deep drilling: From salt to petroleum Early methods of transporting petroleum Indiana's first oil refinery Petroleum: Cable-tool drilling rigs Petroleum: Costs of drilling are high Petroleum: Drilling contractors Petroleum: The geologist and the geophysicist Petroleum: Marine or offshore drilling Petroleum: The pumping unit Petroleum: Refining Petroleum: Rotary drilling Petroleum: Transportation Rock "traps" produce petroleum "Shooting the well": An exciting event in early days The Trenton Field: Energy for the past - and future? Wildcat drilling: Once chance in twenty Paleontology Brachiopods: Easy to find fossils Bryozoa: "Moss animals" of the sea Callixylon: 375-million-year-old wood Cephalopods: 500-million-year-old mollusks Collecting plant fossils in Indiana Conodonts: Micro fossils of distinction Corals: Reef builders in ancient and modern seas Crinoids: Ancient versus modern forms Crinoids: Living fossils of the sea Cystoids and blastoids: Primitive stalked marine animals Dinosaur fossils are not found in Indiana Eurypterids: Scorpions of the sea Fossils: Numbers on the pages of time Gastropods Ice Age mammals: What catastrophe overtook them? Indiana's fossil fusulinids Ostracods Ostracoderms: The first vertebrates Pelecypods Sea urchins: The echninoids Sharks: Monarchs of the ancient seas Sponges in Indiana rocks Spoonbill (polydon spathula): Primitive Hoosier fish The starfish family: Stelleroidea Trace fossils People Willis S. Blatchley: Scholar, educator, naturalist Edward Travers Cox: Indiana State Geologist (1869-1879) Richard Owen: Distinguished Hoosier geologist, teacher, author and soldier Maurice Thomson: A talented Hoosier Rocks and Minerals Glacial erratics: Marker rocks from distant places Heavy minerals can tell many stories Meteorites: Visitors from outer space Pyrite (Fool's Gold): An often-misunderstood iron-sulfide material Rockhounding in Indiana Structural Geology Continental Drift Faults of Southwestern Indiana Geologic time Geology of damsites Geothermal energy The Precambrian basement in Indiana Volcanic ash in Indiana: Tioga and Bentonite