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- Guadalupe Peak and El Capitan in the Guadalupe Mountains, Culberson County, Texas 1
- Earth’s outer crust 2
- Geologic time scale 3
- Generalized geologic map of Texas 4-5
- A mineral is made up of chemical elements 7
- A rock is made up of minerals 8
- Extrusive igneous rocks form at the earth’s surface 9
- Intrusive igneous rocks form beneath the earth’s surface 10
- Soils develop from weathered rock and associated organic material 11
- Conglomerate from Webb County, Texas 11
- Precipitated sediments lining a teakettle 12
- Contact metamorphism 13
- A scalenohedron 14
- Barite specimen showing radial form 15
- Chalcedony showing botryoidal form 16
- Transparent mineral 16
- Streak plate 17
- Conchoidal fracture 18
- Stalactites and stalagmites in the Caverns of Sonora, Sutton County, Texas 19
- Calcite geode from Travis County, Texas 20
- Petrified wood from Texas Gulf Coastal Plain 20
- Prospector’s hammer 22
- Hand lens 22
- Physiographic outline map of Texas 42
- Massive anhydrite 43
- Amphibole asbestos from Gillespie County, Texas 44
- Barite cleavage fragment from west Texas 44
- Basalt from Brewster County, Texas 45
- Calcite has perfect rhombohedral cleavage 46
- Calcite crystals (dog-tooth spar) from the Terlingua area of Brewster County, Texas 47
- Celestite cleavage fragment from Lampasas County, Texas 48
- Cinnabar and calcite crystals from the Terlingua area of Brewster County, Texas 50
- Bentonite is used as a drilling-fluid additive 51
- Hazel copper-silver mine, Culberson County, Texas 53
- Dolomite rock from Burnet County, Texas 54
- Feldspar cleavage fragment from Llano County, Texas 55
- Microcline feldspar crystals from Llano County, Texas 56
- Fluorite has octahedral cleavage 57
- Galena has perfect cubic cleavage 57
- Garnet crystal forms 58
- Gneiss from Blanco County, Texas 59
- Placer gold in stream gravels 60
- Granite from Gillespie County, Texas 61
- Texas State Capitol building at Austin is made of Burnet County granite 62
- Graphite is used in pencil lead, generator brushes, and lubricants 63
- Selenite gypsum crystal from Bastrop County, Texas 64
- Selenite gypsum rosettes from Nolan County, Texas 64
- Fibrous gypsum from Terlingua area, Brewster County, Texas 65
- Salt domes occur on the Gulf Coastal Plain 66
- Specular hematite from Carrizo Mountains, Hudspeth County, Texas 67
- Limestone from Travis County, Texas 68
- Limestone quarry at Georgetown, Williamson County, Texas 69
- Limonite ore is changed to metallic iron in a blast furnace 71
- Metallic iron is made into steel in an open-hearth furnace 72
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