These mostly forest-covered mountains hold a unique geologic structure, the Boulder Batholith. A batholith is a large mass of ...

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 ...

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 ...