Guide to Rocks and Minerals of Illinois
Illinois State Geological Survey
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Table of contents
1. Front matter2. DESCRIPTION OF ROCKS AND MINERALS3. MINERALS4. ROCKS5. GRANITE (1)6. GABBRO (2)7. PORPHYRY (3)8. BASALT (4)9. PERIDOTITE (5)10. GNEISS AND SCHIST (6)11. CONGLOMERATE (7)12. SANDSTONE (8)13. QUARTZITE (9)14. SHALE (10)15. CLAY (11)16. LIMESTONE (12)17. PEAT (13)18. COAL (14)19. PETROLEUM (15)20. GLACIATED PEBBLES (16)21. SILICA SAND (17)22. MOLDING SAND (18)23. TRIPOLI (19)24. FULLER’S EARTH (20)25. QUARTZ (21)26. FELDSPAR (22)27. MICA (23)28. CALCITE (24)29. FLUORITE (25)30. GYPSUM (26)31. CHERT (27)32. PYRITE AND MARCASITE (28)33. LIMONITE (29)34. SPHALERITE (30)35. GALENA (31)36. CONCRETIONS (32)37. GEODES (33)38. ANIMAL FOSSILS (34)39. PLANT FOSSILS (35)40. KEYS FOR IDENTIFICATION OF COMMON ILLINOIS ROCKS AND MINERALS41. ROCK IDENTIFICATION KEY42. EQUIPMENT FOR COLLECTING43. EDUCATIONAL EXTENSION PROGRAM44. Transcriber’s Notes