June 21, 2005
Case Study: Clear Creek Canyon rockslide
Rockfalls and rock slides are common along transportation corridors in the Rocky Mountains. Clear Creek Canyon just west of Golden…
A pegmatite is a plutonic igneous rock that contains crystals larger than 2.5 cm (1 in) in length. Pegmatites are typically found near batholiths. Some pegmatites contain gemstones and rare earth minerals which make them valuable to the economy.