Box Elder County displays a variety of lithologic types in each of the
major rock divisions: sedimentary, igneous, and metamorphic, in a
typical Basin and Range setting. True to the basic structure most of its
mountain ranges generally trend north-south, but the Raft River Range
trends east-west. Each mountain range exhibits a variety of structural
situations: most stratigraphic units are folded and faulted, and many
are intruded by igneous rocks. 251 pages + 3 plates