Geobit Series

Short, informative documents on various geologic topics

Available as Web pages and as Portable Document Format files.

Geobit 1: Exotic Rocks ... or Erratics Are Erratic (PDF file 2.2M)
Geobit 2: End Moraines—the End of the Glacial Ride (PDF file <1M)
Geobit 3: Geodes—Small Treasure Vaults in Illinois (PDF file <1M)
Geobit 4: Fluorite, Our State Mineral (PDF file <1M)
Geobit 5: Illinois' State Fossil: The Tully Monster (PDF file <1M)
Geobit 6: The Trilobite—An Early Inhabitant of Illinois (PDF file <1M)
Geobit 7: Karst Landscapes of Illinois (PDF file <1M)
Geobit 8: History of Oil and Gas Production in Illinois (PDF file <1M)
Geobit 9: Oil Fields in Illinois (PDF file <1M)
Geobit 10: Plate Tectonics: Mysteries Solved! (PDF file <1M)
Geobit 11: Caves in Illinois: Our Subterranean Landscape (PDF file <1M)
Geobit 12: Coal—Illinois' Black Treasure (PDF file <1M)