Generalized geologic map of the southwest rift zone of Mauna Loa Volcano, Hawaii

Geologic map of the northwest flank of Mauna Loa volcano, Island of Hawai‘i, Hawaii

“…The longer the rock is weathered, the greater the color progression. Lipman and Swenson (1984) used this color scheme to tentatively classify the ages of eruptive units within limited areas. The utility of this technique is influenced by elevation, rainfall, and shielding by forest and tephra cover.…”