The Journal of Geology, Vol. 33, No. 5 (Jul. - Aug., 1925), pp. 488-508 (21 pages) The Giants Range batholith is a great body of granite in northeastern Minnesota that lies between the Mesabi and ...

These mostly forest-covered mountains hold a unique geologic structure, the Boulder Batholith. A batholith is a large mass of intrusive igneous rock that made its way to the surface. While ...

The geological abnormality is part of the Boulder Batholith, a 1.2 million-acre mass of igneous rock created by volcanic eruptions millions of years ago. The 160 acres known as Ringing Rocks is ...