Processing

 
 
Featured collections Publications Our Hoosier State Beneath Us
Result Settings
201 resources
201 resources
Large  |  Strip view  |  List  | Map view
 
Refine results
 
 

Our Hoosier State Beneath Us

Short informational pages on a variety of Indiana geology topics, resources, local history, and related subjects for distribution to Indiana newspapers. Created by Indiana Geological Survey staff between 1973 and April 1984.

PDF
The Salem Limestone: "The Nations Building Stone" - Our Hoosier State Beneath Us
The Salem Limestone: "The...  
PDF
Whetstones - Our Hoosier State Beneath Us
Whetstones - Our Hoosier...  
PDF
Geodes: One of Natures Mystery - Our Hoosier State Beneath Us
Geodes: One of Nature's...  
PDF
Gold and Diamonds in Indiana - Our Hoosier State Beneath Us
Gold and Diamonds in...  
PDF
Indianas Buried Valleys - Our Hoosier State Beneath Us
Indiana's Buried Valleys -...  
PDF
Limestone: Indianas State Stone - Our Hoosier State Beneath Us
Limestone: Indiana's State...  
PDF
Volcanic Ash in Indiana - Our Hoosier State Beneath Us
Volcanic Ash in Indiana -...  
PDF
Earthquakes in Indiana - Our Hoosier State Beneath Us
Earthquakes in Indiana -...  
PDF
36,000 Cubic Miles of Indianas Mineral Producing Rocks - Our Hoosier State Beneath Us
36, 000 Cubic Miles of Indi...  
PDF
A Library for Rock Cuttings and Cores - Our Hoosier State Beneath Us
A Library for Rock...  
PDF
Coal Mine Wastes: Potential Source of Energy - Our Hoosier State Beneath Us
Coal Mine Wastes:...  
PDF
Geological Survey Studies Deep Coal Deposits - Our Hoosier State Beneath Us
Geological Survey Studies...  
PDF
Paper Coal: Curious Relic of the Coal Age - Our Hoosier State Beneath Us
Paper Coal: Curious Relic...  
PDF
Sulfur in Indiana Coal - Our Hoosier State Beneath Us
Sulfur in Indiana Coal -...  
PDF
Use of Coal in Hoosierland - Our Hoosier State Beneath Us
Use of Coal in Hoosierland...  
PDF
Salem Limestone - Uses - Our Hoosier State Beneath Us
Salem Limestone - Uses -...  
PDF
Geochemical Exploration Provides Clues to Hidden Mineral Deposits - Our Hoosier State Beneath Us
Geochemical Exploration...  
PDF
ICP-AES: Push Button Chemical Analysis - Our Hoosier State Beneath Us
ICP-AES: Push Button...  
PDF
Radiocarbon Dating Determines the Age of Ancient Life - Our Hoosier State Beneath Us
Radiocarbon Dating...  
PDF
The Indiana Dunes: Relics of the Ice Age - Our Hoosier State Beneath Us
The Indiana Dunes: Relics...  
PDF
Indiana During the Great Ice Age - Our Hoosier State Beneath Us
Indiana During the Great...  
PDF
Indianas Landscape 300 Million Years Ago - Our Hoosier State Beneath Us
Indiana's Landscape 300...  
PDF
Indianas Pioneer Crushed Stone Quarries - Our Hoosier State Beneath Us
Indiana's Pioneer Crushed...  
PDF
Loess: Product of Ice Ages Winds - Our Hoosier State Beneath Us
Loess: Product of Ice Ages...  
PDF
Moraines: Relics of Ice Age Glaciers - Our Hoosier State Beneath Us
Moraines: Relics of Ice...  
PDF
The Mysterious Force of Gravity - Our Hoosier State Beneath Us
The Mysterious Force of...  
PDF
Squire Boone Caverns: Site of Historic Boones Mill - Our Hoosier State Beneath Us
Squire Boone Caverns: Site...  
PDF
Underground Wonders of Indiana - Our Hoosier State Beneath Us
Underground Wonders of...  
PDF
Indianas Pipelines - Our Hoosier State Beneath Us
Indiana's Pipelines - Our...  
PDF
Pioneer Ironworks - Our Hoosier State Beneath Us
Pioneer Ironworks - Our...  
PDF
Pit and Quarry Reclamation in Indiana - Our Hoosier State Beneath Us
Pit and Quarry Reclamation...  
PDF
Solar Energy: Potential Bonanza for Man - Our Hoosier State Beneath Us
Solar Energy: Potential...  
PDF
Brickmaking: One of Mankinds Oldest Industries - Our Hoosier State Beneath Us
Brickmaking: One of...  
PDF
Glass Manufacturing: Product of Indianas First Gas Boom - Our Hoosier State Beneath Us
Glass Manufacturing:...  
PDF
Cement Manufacturing: A Major Hoosier Mineral Industry - Our Hoosier State Beneath Us
Cement Manufacturing: A...  
PDF
Gypsum: Versatile Hoosier Mineral - Our Hoosier State Beneath Us
Gypsum: Versatile Hoosier...  
PDF
Indianas Reef Rocks - Our Hoosier State Beneath Us
Indiana's Reef Rocks -...  
PDF
Melting Glaciers Deposited Our Sands and Gravels - Our Hoosier State Beneath Us
Melting Glaciers Deposited...  
PDF
Indianas Recent "Mini" Oil Boom - Our Hoosier State Beneath Us
Indiana's Recent "Mini"...  
PDF
Petroleum: Operating Companies - Our Hoosier State Beneath Us
Petroleum: Operating...  
PDF
Indianas Ancient Elephants - Our Hoosier State Beneath Us
Indiana's Ancient...  
PDF
David Dale Owen: Pioneer Hoosier Naturalist - Our Hoosier State Beneath Us
David Dale Owen: Pioneer...  
PDF
Water Witching - Our Hoosier State Beneath Us
Water Witching - Our...  
PDF
The Trenton Field: Scene of Indianas First Big Boom - Our Hoosier State Beneath Us
The Trenton Field: Scene...  
PDF
The Falls of the Ohio - Our Hoosier State Beneath Us
The Falls of the Ohio -...  
PDF
Coal : Historic Hoosier Mineral Industry - Our Hoosier State Beneath Us
Coal : Historic Hoosier...  
PDF
Alphabetical listing of titles from the series titled "Our Hoosier State Beneath Us"
Alphabetical listing of...  
PDF
"Our Hoosier State Beneath Us" compilation
"Our Hoosier State Beneath...  
PDF
The Precambrian Basement in Indiana - Our Hoosier State Beneath Us
The Precambrian Basement...  
PDF
Geothermal Energy - Our Hoosier State Beneath Us
Geothermal Energy - Our...  
PDF
Geology of Damsites - Our Hoosier State Beneath Us
Geology of Damsites - Our...  
PDF
Geologic Time - Our Hoosier State Beneath Us
Geologic Time - Our...  
PDF
Faults of Southwestern Indiana - Our Hoosier State Beneath Us
Faults of Southwestern...  
PDF
Continental Drift - Our Hoosier State Beneath Us
Continental Drift - Our...  
PDF
Rockhounding in Indiana - Our Hoosier State Beneath Us
Rockhounding in Indiana -...  
PDF
Pyrite (Fools Gold): An Often-Misunderstood Iron-Sulfide Mineral - Our Hoosier State Beneath Us
Pyrite (Fool's Gold): An...  
PDF
Meteorites: Visitors from Outer Space - Our Hoosier State Beneath Us
Meteorites: Visitors from...  
PDF
Heavy Minerals can Tell many Stories - Our Hoosier State Beneath Us
Heavy Minerals can Tell...  
PDF
Glacial Erratics: Marker Rocks from Distant Places - Our Hoosier State Beneath Us
Glacial Erratics: Marker...  
PDF
Maurice Thompson: A Talented Hoosier - Our Hoosier State Beneath Us
Maurice Thompson: A...  
PDF
Richard Owen: Distinguished Hoosier Geologist, Teacher, Author, and Soldier - Our Hoosier State Beneath Us
Richard Owen:...  
PDF
Edward Travers Cox: Indiana State Geologist (1869-79) - Our Hoosier State Beneath Us
Edward Travers Cox:...  
PDF
Willis S. Blatchley: Scholar, Educator, Naturalist - Our Hoosier State Beneath Us
Willis S. Blatchley:...  
PDF
Crinoids: Living Fossils of the Sea - Our Hoosier State Beneath Us
Crinoids: Living Fossils...  
PDF
Crinoids: Ancient Versus Modern Forms - Our Hoosier State Beneath Us
Crinoids: Ancient Versus...  
PDF
Corals: Reef Builders in Ancient and Modern Seas - Our Hoosier State Beneath Us
Corals: Reef Builders in...  
PDF
Conodonts: Microfossils of Distinction - Our Hoosier State Beneath Us
Conodonts: Microfossils of...  
PDF
Collecting Plant Fossils in Indiana - Our Hoosier State Beneath Us
Collecting Plant Fossils...  
PDF
Cephalopods: 500-Million-Year-Old Mollusks - Our Hoosier State Beneath Us
Cephalopods:...  
PDF
Callixylon: 375-Million-Year-Old Wood - Our Hoosier State Beneath Us
Callixylon:...  
PDF
Trace Fossils - Our Hoosier State Beneath Us
Trace Fossils - Our...  
PDF
The Starfish Family: Stelleroidea - Our Hoosier State Beneath Us
The Starfish Family:...  
PDF
Spoonbill (Polydon spathula): Primitive Hoosier Fish - Our Hoosier State Beneath Us
Spoonbill (Polydon...  
PDF
Sponges in Indiana Rocks - Our Hoosier State Beneath Us
Sponges in Indiana Rocks -...  
PDF
Sharks: Monarchs of Ancient Seas - Our Hoosier State Beneath Us
Sharks: Monarchs of...  
PDF
Sea Urchins: The Echinoids - Our Hoosier State Beneath Us
Sea Urchins: The Echinoids...  
PDF
Bryozoa: "Moss Animals" of the Sea - Our Hoosier State Beneath Us
Bryozoa: "Moss Animals" of...  
PDF
Pelecypods - Our Hoosier State Beneath Us
Pelecypods - Our Hoosier...  
PDF
Ostracoderms: The First Vertebrates - Our Hoosier State Beneath Us
Ostracoderms: The First...  
PDF
Ostracods - Our Hoosier State Beneath Us
Ostracods - Our Hoosier...  
PDF
Indianas Fossil Fusulinids - Our Hoosier State Beneath Us
Indiana's Fossil...  
PDF
Ice Age Mammals: What Catastrophe Overtook Them? - Our Hoosier State Beneath Us
Ice Age Mammals: What...  
PDF
Gastropods - Our Hoosier State Beneath Us
Gastropods - Our Hoosier...  
PDF
Fossils: Numbers on the Pages of Time - Our Hoosier State Beneath Us
Fossils: Numbers on the...  
PDF
Eurypterids: Scorpions of the Sea - Our Hoosier State Beneath Us
Eurypterids: Scorpions of...  
PDF
Dinosaur Fossils are Not Found in Indiana - Our Hoosier State Beneath Us
Dinosaur Fossils are Not...  
PDF
Cystoids and Blastoids: Primitive Stalked Marine Animals - Our Hoosier State Beneath Us
Cystoids and Blastoids:...  
PDF
Brachiopods: Easy to Find Fossils - Our Hoosier State Beneath Us
Brachiopods: Easy to Find...  
PDF
Petroleum: The Pumping Unit - Our Hoosier State Beneath Us
Petroleum: The Pumping...  
PDF
Petroleum: Marine or Offshore Drilling - Our Hoosier State Beneath Us
Petroleum: Marine or...  
PDF
Petroleum: The Geologist and the Geophysicist - Our Hoosier State Beneath Us
Petroleum: The Geologist...  
PDF
Petroleum: Drilling Contractors - Our Hoosier State Beneath Us
Petroleum: Drilling...  
PDF
Petroleum: Costs of Drilling are High - Our Hoosier State Beneath Us
Petroleum: Costs of...  
PDF
Petroleum: Cable-Tool Drilling Rigs - Our Hoosier State Beneath Us
Petroleum: Cable-Tool...  
PDF
Indianas First Oil Refinery - Our Hoosier State Beneath Us
Indiana's First Oil...  
PDF
Early Methods of Transporting Petroleum - Our Hoosier State Beneath Us
Early Methods of...  
PDF
Wildcat Drilling: One Chance in Twenty - Our Hoosier State Beneath Us
Wildcat Drilling: One...  
PDF
The Trenton Field: Energy for the Past - and Future? - Our Hoosier State Beneath Us
The Trenton Field: Energy...  
PDF
Shooting the Well: An Exciting Event in the Early Days - Our Hoosier State Beneath Us
Shooting the Well: An...  
PDF
Rock "Traps" Produce Petroleum - Our Hoosier State Beneath Us
Rock "Traps" Produce...  
PDF
Petroleum: Transportation - Our Hoosier State Beneath Us
Petroleum: Transportation...  
PDF
Petroleum: Rotary Drilling - Our Hoosier State Beneath Us
Petroleum: Rotary Drilling...  
PDF
Petroleum: Refining - Our Hoosier State Beneath Us
Petroleum: Refining - Our...  
PDF
Deep Drilling: From Salt to Petroleum - Our Hoosier State Beneath Us
Deep Drilling: From Salt...  
PDF
Underclay: A Once-Important Hoosier Mineral Resource - Our Hoosier State Beneath Us
Underclay: A...  
PDF
Sand and Gravel: Gift of the Ice Age Glaciers - Our Hoosier State Beneath Us
Sand and Gravel: Gift of...  
PDF
Peat Moss from Ice Age Lakes and Swamps - Our Hoosier State Beneath Us
Peat Moss from Ice Age...  
PDF
The New Albany Shale: Source of Fuel for the Future? - Our Hoosier State Beneath Us
The New Albany Shale:...  
PDF
Natural Molding Sand: Historic Hoosier Mineral Resource - Our Hoosier State Beneath Us
Natural Molding Sand:...  
PDF
Marl - Our Hoosier State Beneath Us
Marl - Our Hoosier State...  
PDF
Lightweight Aggregate - Our Hoosier State Beneath Us
Lightweight Aggregate -...  
PDF
Legendary Ore Deposits of Indiana - Our Hoosier State Beneath Us
Legendary Ore Deposits of...  
PDF
Zinc: Potential Hoosier Mineral Resource - Our Hoosier State Beneath Us
Zinc: Potential Hoosier...  
PDF
Indianite: Hoosier Rock with a Past - Our Hoosier State Beneath Us
Indianite: Hoosier Rock...  
PDF
New Harmony: 19th Century Center of Culture and Science - Our Hoosier State Beneath Us
New Harmony: 19th Century...  
PDF
Natural Cement: Pioneer Hoosier Mineral Industry - Our Hoosier State Beneath Us
Natural Cement: Pioneer...  
PDF
Lime Kilns: Relics of One of Indianas Historic Mineral Industries - Our Hoosier State Beneath Us
Lime Kilns: Relics of One...  
PDF
Indiana Mineral Wool Helps save Energy - Our Hoosier State Beneath Us
Indiana Mineral Wool Helps...  
PDF
Indianas Glass-Sand Industry - Our Hoosier State Beneath Us
Indiana's Glass-Sand...  
PDF
Greene Countys Railroad Viaduct: Third Largest in the World - Our Hoosier State Beneath Us
Greene County's Railroad...  
PDF
Burton Tunnel: One of Indianas Longest Railroad Tunnels - Our Hoosier State Beneath Us
Burton Tunnel: One of...  
PDF
Buhrstones: Grain Grinders of Pioneer Mills - Our Hoosier State Beneath Us
Buhrstones: Grain Grinders...  
PDF
Reuben Wells: Hoosier Locomotive of Distinction - Our Hoosier State Beneath Us
Reuben Wells: Hoosier...  
PDF
Tunnel Mill: One of Indianas Historic Water Mills - Our Hoosier State Beneath Us
Tunnel Mill: One of...  
PDF
Portland Cement: Rediscovery of Ancient Romes Hydraulic Cement - Our Hoosier State Beneath Us
Portland Cement:...  
PDF
Pioneer Brickmaking in Indiana - Our Hoosier State Beneath Us
Pioneer Brickmaking in...  
PDF
Old Mill at Spring Mill State Park - Our Hoosier State Beneath Us
Old Mill at Spring Mill...  
PDF
Bonneyville Mill: One of Northern Indianas Historic Gristmills - Our Hoosier State Beneath Us
Bonneyville Mill: One of...  
PDF
Eagle Creek Reservoir: Solution to an Environmental Problem - Our Hoosier State Beneath Us
Eagle Creek Reservoir:...  
PDF
Clifty Falls State Park - Our Hoosier State Beneath Us
Clifty Falls State Park ...  
PDF
Cataract Falls - Our Hoosier State Beneath Us
Cataract Falls - Our...  
PDF
Brown County State Park: Land of Scenic Hills, Ridges, and Valleys - Our Hoosier State Beneath Us
Brown County State Park:...  
PDF
Wyandotte Cave - Our Hoosier State Beneath Us
Wyandotte Cave - Our...  
PDF
Bluffs of Beaver Bend: A Scenic Feature of Martin County - Our Hoosier State Beneath Us
Bluffs of Beaver Bend: A...  
PDF
Williamsport Falls (Dry Falls) - Our Hoosier State Beneath Us
Williamsport Falls (Dry...  
PDF
Versailles State Park - Our Hoosier State Beneath Us
Versailles State Park -...  
PDF
Turtle Rock (Pulpit Rock, Rostrum Rock) - Our Hoosier State Beneath Us
Turtle Rock (Pulpit Rock...  
PDF
Turkey Run State Park: The Power of Erosion - Our Hoosier State Beneath Us
Turkey Run State Park: The...  
PDF
Standing Rocks: Ancient Erosion Remnants - Our Hoosier State Beneath Us
Standing Rocks: Ancient...  
PDF
Spring Mill State Park - Our Hoosier State Beneath Us
Spring Mill State Park -...  
PDF
Shades State Park: A Missing Part of the Geologic Story - Our Hoosier State Beneath Us
Shades State Park: A...  
PDF
Seven Pillars of the Mississinewa: Scenic Hoosier Landform - Our Hoosier State Beneath Us
Seven Pillars of the...  
PDF
Sand Dunes of Southern Indiana - Our Hoosier State Beneath Us
Sand Dunes of Southern...  
PDF
Pokagon State Park: Ice Age Legacy - Our Hoosier State Beneath Us
Pokagon State Park: Ice...  
PDF
Bluespring Caverns: A Unique System of Hoosier Caves - Our Hoosier State Beneath Us
Bluespring Caverns: A...  
PDF
Pine Hills Nature Preserve and the Devils Backbone - Our Hoosier State Beneath Us
Pine Hills Nature Preserve...  
PDF
Oil from Troubled Waters? - Our Hoosier State Beneath Us
Oil from Troubled Waters?...  
PDF
The Ohio River Story - Part V - Our Hoosier State Beneath Us
The Ohio River Story -...  
PDF
The Ohio River Story - Part IV - Our Hoosier State Beneath Us
The Ohio River Story -...  
PDF
The Ohio River Story - Part III - Our Hoosier State Beneath Us
The Ohio River Story -...  
PDF
The Ohio River Story - Part II - Our Hoosier State Beneath Us
The Ohio River Story -...  
PDF
The Ohio River story - Part I - Our Hoosier State Beneath Us
The Ohio River story -...  
PDF
Mineral Waters and Health Resorts in Indiana - Our Hoosier State Beneath Us
Mineral Waters and Health...  
PDF
McCormicks Creek: Indianas First State Park - Our Hoosier State Beneath Us
McCormick's Creek:...  
PDF
Marengo Cave: One of Indianas Most Beautiful Caverns - Our Hoosier State Beneath Us
Marengo Cave: One of...  
PDF
Bear Creek Canyon and Portland Arch - Our Hoosier State Beneath Us
Bear Creek Canyon and...  
PDF
Lost River: Ghost Stream of Southern Indiana - Our Hoosier State Beneath Us
Lost River: Ghost Stream...  
PDF
The Knobstone Escarpment: Scenic Hoosier Landform - Our Hoosier State Beneath Us
The Knobstone Escarpment:...  
PDF
Klintar: Ancient Marine Reefs of the Wabash Valley - Our Hoosier State Beneath Us
Klintar: Ancient Marine...  
PDF
Kentland Dome: Geologic Enigma - Our Hoosier State Beneath Us
Kentland Dome: Geologic...  
PDF
Indianas Region of Karst Topography - Our Hoosier State Beneath Us
Indiana's Region of Karst...  
PDF
Hemlock Cliffs - Our Hoosier State Beneath Us
Hemlock Cliffs - Our...  
PDF
Harrison Spring: One of the Largest in the Midwest - Our Hoosier State Beneath Us
Harrison Spring: One of...  
PDF
Hanging Rock: A Relic of Ancient Seas - Our Hoosier State Beneath Us
Hanging Rock: A Relic of...  
PDF
Glacial Lake Flatwoods - Our Hoosier State Beneath Us
Glacial Lake Flatwoods -...  
PDF
Eyeless Fish in Indiana Caves - Our Hoosier State Beneath Us
Eyeless Fish in Indiana...  
PDF
Anderson Falls - Our Hoosier State Beneath Us
Anderson Falls - Our...  
PDF
Microanalyses by Electrons: The Ultimate Alchemist - Our Hoosier State Beneath Us
Microanalyses by...  
PDF
Isotopes: Tiny Atoms Tell Stories Eons Old - Our Hoosier State Beneath Us
Isotopes: Tiny Atoms Tell...  
PDF
Geological Survey Coring Program - Our Hoosier State Beneath Us
Geological Survey Coring...  
PDF
Geologic Field Mapping: Grassroots Geology Helps Solve Surface Problems and Find Mineral Deposits - Our Hoosier State Beneath Us
Geologic Field Mapping:...  
PDF
Fluid Inclusions: Geologic Thermometers - Our Hoosier State Beneath Us
Fluid Inclusions: Geologic...  
PDF
Earth Magnetism: A Tool for Subsurface Studies - Our Hoosier State Beneath Us
Earth Magnetism: A Tool...  
PDF
Computers in Geology - Our Hoosier State Beneath Us
Computers in Geology -...  
PDF
Atomic Clocks Measure Geologic Time - Our Hoosier State Beneath Us
Atomic Clocks Measure...  
PDF
When White is Right - Our Hoosier State Beneath Us
When White is Right - Our...  
PDF
Well Logs: The Rock Record on Paper - Our Hoosier State Beneath Us
Well Logs: The Rock Record...  
PDF
Scanning Electron Microscope: Geologists Big Eye on the Ultrasmall - Our Hoosier State Beneath Us
Scanning Electron...  
PDF
Acid Rain: Environmental Problem of Industrialization - Our Hoosier State Beneath Us
Acid Rain: Environmental...  
PDF
Salem Limestone - Venerable Veneer - Our Hoosier State Beneath Us
Salem Limestone -...  
TIF
Salem Limestone - Quarrying - HSBU DS-5 - Our Hoosier State Beneath Us
Salem Limestone -...  
PDF
Salem Limestone - Its Origin in the Salem Sea - Our Hoosier State Beneath Us
Salem Limestone - Its...  
PDF
Salem Limestone - Milling - Our Hoosier State Beneath Us
Salem Limestone - Milling...  
PDF
Salem Limestone - Carving and Sculpture - Our Hoosier State Beneath Us
Salem Limestone - Carving...  
PDF
Microfossils of the Salem Limestone - Our Hoosier State Beneath Us
Microfossils of the Salem...  
PDF
History of Coal Mining in Indiana - Our Hoosier State Beneath Us
History of Coal Mining in...  
PDF
Distribution of Coal in Indiana - Our Hoosier State Beneath Us
Distribution of Coal in...  
PDF
Composition of Coal - Our Hoosier State Beneath Us
Composition of Coal - Our...  
PDF
Coal Liquefaction - Our Hoosier State Beneath Us
Coal Liquefaction - Our...  
PDF
Coal Gasification: A Source of Clean Energy - Our Hoosier State Beneath Us
Coal Gasification: A...  
PDF
Coal Balls: Preservers of Organisms that Lived in Ancient Swamps - Our Hoosier State Beneath Us
Coal Balls: Preservers of...  
PDF
Chemical Properties of Coal - Our Hoosier State Beneath Us
Chemical Properties of...  
PDF
Cannel Coal - Our Hoosier State Beneath Us
Cannel Coal - Our Hoosier...  
PDF
Underground Coal Mining in Indiana - Our Hoosier State Beneath Us
Underground Coal Mining in...  
PDF
Surface-Mined Land in Indiana - Our Hoosier State Beneath Us
Surface-Mined Land in...  
PDF
Physical Properties of Coal - Our Hoosier State Beneath Us
Physical Properties of...  
PDF
Peacock Coal - Our Hoosier State Beneath Us
Peacock Coal - Our Hoosier...  
PDF
Methods of Mining Coal - Our Hoosier State Beneath Us
Methods of Mining Coal -...  
PDF
Methane in Coal - Our Hoosier State Beneath Us
Methane in Coal - Our...  
PDF
Low-Sulphur Coal - Our Hoosier State Beneath Us
Low-Sulphur Coal - Our...  
PDF
Block Coals - Our Hoosier State Beneath Us
Block Coals - Our Hoosier...