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
Fall River granite of the underlying granite is the Hixville Fault near Dartmouth, Massachusetts. From a distance, the rock exhibits a distinctive tan-gray color. Viewed up close, it is more pink. The granite is very hard and durable, but cannot be polished very well. As a result, its appearance on a building is almost always somewhat rough, rather than the sharp lines of other types of building stone. Edmund Hitchcock, of the 1841 Geological Survey of Massachusetts gave the following description of the granite: But no rock can be finer for architectural purposes than the granite of Troy...The feldspar of this rock is