Conway granite Conway granite Conway granite is a typically pink mineral-rich igneous (or mesoperthitic) biotite granite. It is amphibole-free and of coarse particle size (with portions of the rock fine-grained or porphyritic). Conway granite has a relatively high concentration of thorium, at about 56 (±6) PPM; this amount is not enough to make the granite dangerously radioactive, but it is sufficient to make the rock a low-grade (almost certainly not economic, at least in the early years) source of thorium for a thorium fuel cycle. Geologist Edward Hitchcock named the granite in 1877 after the town of Conway, New Hampshire, which is
Granite Falls, Minnesota Granite Falls, Minnesota Granite Falls is a city in Chippewa, Renville and Yellow Medicine counties in the State of Minnesota. The population was 2,897 at the 2010 census. It is the county seat of Yellow Medicine County. The Andrew John Volstead House, a National Historic Landmark, is located in Granite Falls. Granite Falls was platted in 1872. The city was named for deposits of granite rock in the area. A post office has been in operation at Granite Falls since 1870. Granite Falls was incorporated as a city in 1889. On July 25, 2000, the city of Granite Falls and