Mauna Kea as viewed from part way up Mauna Loa. Notice the many large cinder cones on the flank and summit. About 4/5 of the way to the top and extending across the whole mountain is a rock unit with many gullies cut into it and a relatively horizontal top surface. This is a moraine--a deposit of gravel, boulders, sand and fine silt left over from a glacier that occupied the Mauna Kea summit during the last ice age. The dark lava in the foreground is from Mauna Loa. For a wider-angle view, go to the next photo. (January 1986)

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