Conway granite near where it is mined. The Old Man of the Mountain, a famous geologic feature in New Hampshire (which collapsed in 2003) was made of Conway granite. The formation is found throughout the lower areas of the central White Mountains, such as Franconia Notch, Crawford Notch, the center of the Pemigewasset Wilderness, and the Saco River valley. Other exposures of the formation include the Belknap Mountains south of Lake Winnipesaukee. 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).
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