The magma then exploits these areas and the lava comes out in a fountaining effect. Now when an eruption is over, the lava remaining in the crack or fissure hardens into a wall like mass called a dike. Generally, dikes are about a half-yard in width and may extend hundreds of feet in length. On Maui, prominent dikes appear in Ukumehame Canyon in West Maui and in the summit depression of Haleakala. Where streams have cut canyons in old rift zones, you can sometimes count as many as four hundred dikes in a mile distance.
Shield volcanoes produce an awful lot of lava.
Haleakala alone contains enough lava material to make one hundred Mt. Fujiyama's in Japan. A Hawaiian Legend On How The Islands Were Formed. Papa was mother of the earth. Wakea was father of the heavens. They lived together in the time of Po, which was the time of darkness.