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This image is of a sedimentary rock. (Courtesy C. Alexander)
This image is of a sedimentary rock. (Courtesy C. Alexander)
This image is of a sedimentary rock. (Courtesy C. Alexander)
This image is of a sedimentary rock. (Courtesy C. Alexander)
This image is of a sedimentary rock. (Courtesy C. Alexander)
Sandstone. Sandstone is a sedimentary rock. (Courtesy: Corel Stock Photo)
This image is of a granite. (Courtesy C. Alexander)
This image is of a granite. (Courtesy C. Alexander)
This image is of a granite. (Courtesy C. Alexander)
This image is of a basalt. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows bedded layers. (Courtesy C. Alexander)
This image shows rock erosion. (Courtesy C. Alexander)
Calcite on fluorite (Courtesy: Corel Photo Studio)
Calcite intrusion (Courtesy: Corel Photo Studio)
Citrine (Courtesy: Corel Photo Studio)
Copper (Courtesy: Corel Photo Studio)
Dolomite (Courtesy: California Institute of Technology)
Dolomite (Courtesy: California Institute of Technology)
Epidote (Courtesy: California Institute of Technology)
Feldspar (Courtesy: California Institute of Technology)
Gypsum (Courtesy: California Institute of Technology)
Hematite (Courtesy: California Institute of Technology)
Hematite (Courtesy: California Institute of Technology)
Hornblende (Courtesy: Corel Photo Studio)
Malachite (Courtesy: Corel Photo Studio)
Pyrite (Courtesy: Corel Photo Studio)
Quartz (Courtesy: Corel Photo Studio)
Smoky quartz (Courtesy: Corel Photo Studio)
Quartz cave (Courtesy: Corel Photo Studio)
Quartz geode (Courtesy: Corel Photo Studio)
Quartz with calcite growth (Courtesy: Corel Photo Studio)
Mica splitting quartz (Courtesy: Corel Photo Studio)
Selenite (colorless transparent variety of Gypsum) (Courtesy: Corel Photo Studio)
Realgar (Courtesy: Corel Photo Studio)
Rhodochrosite (Courtesy: Corel Photo Studio)
Tourmaline (Rubellite) (Courtesy: Corel Photo Studio)
Tourmaline rutile quartz (Courtesy: Corel Photo Studio)
Black tourmaline in quartz (Courtesy: Corel Photo Studio)