by thomas p dolley usgs minerals
USGS Minerals Information: Commodity SpecialistsFeb 12, 2018 . Minerals Information commodity specialists collect and analyze information on production, trade, and consumption of minerals from raw material through .. Quartz Crystal Thomas P. Dolley Phone: 703-648-7710. Fax: 703-648-7757. Email: tdolleyusgs. Return to Alphabetical Index. R. Rare Earthsby thomas p dolley usgs minerals,diatomite - USGS Mineral Resources ProgramBy Thomas P. Dolley. Domestic survey data and tables were prepared by Shantae F. Hawkins, statistical assistant, and the world production table was prepared by Linder Roberts, international data coordinator. Production of diatomite in the United States decreased by about 9% to 677,000 metric tons (t), and its value.Mineral Commodity Summaries 2017 - USGS Mineral Resources .. shipping it to almost every region of the world. The high level of exports was attributed to the high-quality and advanced processing techniques used in the United States for many grades of silica sand and gravel, meeting virtually every specification. Prepared by Thomas P. Dolley [(703) 648–7710, tdolleyusgs].