Chapter D

Definition, rock and mineral 5, 73, 74
Developing mineral deposit 24, 59
Diabase 44, 48, 49, 73
Diamonds 40, 65
Diaspore clay 27, 58, 66, 73
Dike 46, 47, 48
Dolomite 10, 11, 18, 59, 60, 73, 74
Dolomite chemical composition 12, 20
Double refraction 18
Drusy quartz 42

E
Effervescence 10, 11, 16, 17, 18, 19
Elephant Rocks 39, 41

F
Feldspar 38, 39, 43, 45, 46, 54, 74
Festus 33
Fire clay 19, 24, 73
Flat River 60
Flint 14, 34
Flint fire clay 26, 73
Fool’s gold 14, 51
Fossils 12, 22, 35, 36, 52, 53, 69
Franklin County 27
Fredericktown 60

G
Gabbro 13, 38, 44, 48, 73
Galena 59, 65, 74
Gasconade County 26, 27
Geiger Counter 66
Geode 42, 67
Geological Survey, Missouri 6
Glacial boulders and deposits 40, 48, 55, 65, 74
Glass “tiff,” barite 61
Gneiss 54, 73
Gold 51, 53, 65
Granite 16, 31, 38, 43, 46, 47, 49, 53, 54, 73
Graniteville 39, 43
Gypsum 19, 49, 61, 62, 63, 74

H
Hardness 6, 19, 65
Heavy spar 61
Hematite 56, 66, 74
Hermann 33
Houston 62
Hydrochloric acid 10