Earth's outer crust Geologists Time and rock units Geologic map What are rocks and minerals? Chemical elements Minerals Rocks Igneous rocks Extrusive or volcanic igneous rocks Intrusive igneous rocks Sedimentary rocks Soils Sedimentary rock materials in broken fragments Sedimentary rock materials in solution Cementing materials and chemical sediments Sedimentary rocks formed by plants and animals Metamorphic rocks Static metamorphism Contact metamorphism Dynamic metamorphism Occurrence and properties of minerals How minerals occur Crystalline minerals Crystals Imperfect crystals Amorphous minerals Some distinguishing properties of minerals Color Luster Transmission of light Hardness Streak or powder Cleavage Parting Fracture Specific gravity Effervescence in acid Some special occurrences of minerals Cave deposits Concretions Geodes Petrified wood Collecting rocks and minerals Rock and mineral identification charts How to use the mineral identification charts Key to mineral identification charts Mineral identification charts How to use the rock identification charts Rock identification charts Descriptions of some Texas rocks and minerals Anhydrite Asbestos Barite Basalt Calcite Cassiterite Celestite Cinnabar Clay Copper minerals (chalcocite, chalcopyrite, malachite, azurite) Dolomite Feldspar Fluorite Galena Garnet Gneiss Gold Granite Graphite Gypsum Halite Hematite Limestone Limonite Llanite Magnetite Manganese minerals (braunite, hollandite, pyrolusite) Marble Mica Obsidian and vitrophyre Opal Pegmatite Pyrite Quartz Quartzite Rhyolite Sand and sandstone Schist Serpentine Shale Silver minerals (argentite, cerargyrite, native silver) Sulfur Talc and soapstone Topaz Tourmaline Uranium minerals (carnotite, uranophane, pitchblende) Volcanic ash (pumicite) Composition, hardness, and specific gravity of some Texas minerals Books about rocks and minerals Nontechnical books for beginners Textbooks and other reference books Selected references on Texas rocks and minerals

Texas Rocks is a colorful quick identification guide to rocks and minerals in the State. Identification of rocks and minerals is based on color, hardness, crystal shape, and unique features. The guide provides brief descriptions of the types of rocks, differences between rocks and minerals, and mineral groupings. While accurate identification of rocks and minerals often requires extensive laboratory techniques, many are easily identified by unique combinations of the features listed above. The rocks and minerals in this guide have been chosen specifically because they are either unique to Texas or commonly available and easily identified. This waterproof, pocket-sized quick reference also contains information on proper collection and documentation of specimens you may find, and rules and regulations concerning such activities. Collectors of every level will find this information helpful. This guide is a must-have for anyone who wants a quick and easy way to identify rocks and mineral

The family of James Alvis Lynch headed west from Denison, Texas, to find a dry climate that would alleviate Lynch's symptoms of malaria and his wife Amanda's rheumatism. They traveled as far as the Brazos River, where U.S. 180 crosses today, when one of their oxen drowned, and the other was struck by lightning. To make matters worse, the Lynches learned of hair-raising tales of the struggles between Comanches and settlers. So on Christmas Eve in 1877, the Lynch family decided to settle 4 miles east of the Brazos in the beautiful valley between what are the East and West Mountains in present-day Mineral Wells. There, the Lynch family discovered the mineral-rich water that mended their maladies and brought tourists from far and wide to take the healing cure. The geology of the area also brought oil, gas, and brick plants, while the attacks on local settlers brought a military presence to the region. The history of Mineral Wells is alive today, as many descendants of early pioneers still live and work in the community, full of pride for their families' contributions to the area.

This text explores the natural history of Texas and more than 2900 springs in 183 Texas counties. It also includes an in-depth discussion of the general characteristics of springs - their physical and prehistoric settings, their historical significance, and their associated flora and fauna.