Fig. 2. An interpretive diagram, showing relative positions of units A-F in the Gold Butte anticline; not at the same scale as in Fig. 1. A = felsic diorite; B and D = mafic diorite; C = mafic diorite, gabbro, mafic gabbro, and ultramafic rocks (black areas indicate two layers rich in mafic silicates); E and F = mafic diorite, gabbro, and mafic gabbros.