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
California Coastal Comm'n v. Granite Rock Co. California Coastal Comm'n v. Granite Rock Co. California Coastal Comm'n v. Granite Rock Co., 480 U.S. 572 (1987), is a United States Supreme Court case addressing the question of whether United States Forest Service regulations, federal land use statutes and regulations, or the Coastal Zone Management Act of 1972, preempt the California Coastal Commission's imposition of a permit requirement on operation of an unpatented mining claim in a national forest. The court ruled that even if federal land is not included in the Coastal Zone Management Act's interpretation of "coastal zone," the act does not automatically preempt all state regulation