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Moku‘aweoweo caldera, at the summit of Mauna Loa

CALDERAS, MAGMA CHAMBERS, AND THE TRANSITION OF A HAWAIIAN VOLCANO FROM YOUTHFUL VIGOR TO MIDDLE AGE. -. Moku‘aweoweo caldera, at the summit of Mauna Loa. -. Kilauea caldera:. Complex caldera- boundary faults, and Halema‘uma‘u, (H) an intra-caldera pit crater. 1954 lava flow. H.

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Moku‘aweoweo caldera, at the summit of Mauna Loa

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  1. CALDERAS, MAGMA CHAMBERS, AND THE TRANSITION OF A HAWAIIAN VOLCANO FROM YOUTHFUL VIGOR TO MIDDLE AGE - Moku‘aweoweo caldera, at the summit of Mauna Loa

  2. - Kilauea caldera: Complex caldera- boundary faults, and Halema‘uma‘u, (H) an intra-caldera pit crater 1954 lava flow H

  3. Magma chamber processes, as long as there is sufficient supply to keep the magma chamber from solidifying

  4. Complex migration of the center of inflation prior to an eruption in 1967. During the ensuing eruption, the deflation pattern was not a reverse of the inflation pattern. Fiske & Kinoshita (1969)

  5. The cumulative “collapse” profile of the Kilauea caldera since 1823 is funnel-shaped rather than piston shaped.

  6. Vertical air photo of Moku‘aweoweo, the summit caldera of Mauna Loa. Note flows truncated by caldera margin. - ~5 km

  7. Ryan et al. (1882)

  8. Rift zones on O‘ahu are identified most easily by mapping dike swarms. Ko‘olau rift zone axes and caldera Wai‘anae rift zone axes and caldera

  9. Savaii (Samoa) has very prominent rift zones marked by scoria cones

  10. Karthala volcano on Grand Comoro (about 1/2-way between Mozambique and Madagascar) is the volcano most similar to Hawaiian volcanoes with respect to rift zones and a caldera

  11. - Mauna Loa, viewed from Kilauea

  12. - Mauna Kea Mauna Loa Hualalai Kohala Hawai‘i, viewed from Maui

  13. Mauna Kea, viewed from Hilo airport.

  14. erupting lava has all it’s original gas content and has cooled erupting magma makes the whole journey w/o stopping solidified magma chamber Mauna Kea, viewed from Mauna Loa

  15. -volcano moves off hotspot -magma production declines -alkalic composition of magma -magma chamber solidifies -Hualalai, Mauna Kea -

  16. PAU

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