Musical Sand http://www.bigai.ne.jp/~miwa/
Information on musical sand(including squeaking sand and booming sand) and various powders which are milling products using stone mills.
Oregon Geology http://sarvis.dogami.state.or.us/
The Oregon Department of Geology and Mineral Industries. News and information about state geology, gems and minerals, earthquakes and other natural hazards, energy resources, cartography, and related topics.
The Geology of Virginia http://www.wm.edu/geology/virginia/
The geology of Virginia by province: descriptions, diagrams, maps, photographs, and geologic history of the Appalachian Plateau, Valley and Ridge, Blue Ridge, Piedmont, and Atlantic Coastal Plain geologic provinces.
USGS National Geologic Map Database http://ngmdb.usgs.gov/
Searchable catalog of paper and digital geologic maps, mostly for the U.S. Maps and related data cover: geology, hazards, earth resources, geophysics, geochemistry, geochronology, paleontology, and marine geology.
