In the far, northwestern corner of Oklahoma's Panhandle, you can find Black Mesa State Park and Black Mesa Nature Preserve. Taking its name from the black lava rock that coated the mesa around 30 ...

THE plasticity of rock salt crystals when immersed in water has been the subject of much attention recently1. The fact that the effect takes place more easily in hot water suggests that the rate ...

“Spiral Jetty,” 1970, Great Salt Lake, Utah (black rock, salt crystals, earth, red algae, water, 3 x 15 x 1,500 feet); Collection of Dia Art Foundation; (c) Estate of Robert Smithson, Licensed ...