Excerpts by JP Lockwood’s Paper, Mauna Loa Edgy History: The Preliminary Radiocarbon Record


The location of vents intended for lava moves erupted by Mauna Loor in the past 15, 000 years may vary between summit caldera and rift zones in a systematic method (Lockwood, 1995). Below are excerpts from Lockwood's paper, Mauna Loa Eruptive History -- The Initial Radiocarbon Record, in which this individual proposes a cyclic model to explain the long-term eruptive behavior of Mauna Alabanza of the previous several thousand years. New geologic research and radiocarbon ages for additional lava flows may result in other models or a refinement of Lockwood's cyclic model.

Aerial look at of lava fissure and flows by northeast rift of Mauna Loa on March twenty-five, 1984 Photograph by M. P. Lockwood on Mar 25, 1984.

Eruptive cassure high on the northeast rift zone of Mauna Loa about 12 hours following the eruption made its debut in Moku`aweoweo Caldera (top left). Although traditional eruptions of Mauna Loor have occurred from both the peak and the volcano's two rift zones, geologic mapping demonstrates the focus of activity alternates between the rift zones and summit place over a time span of about a couple of, 000 years. Overview

Radiocarbon dating of Mauna Alabanza lava goes has offered one of the most enhanced eruptive chronologies of virtually any volcano on Earth. An analysis of 168 well-dated prehistoric lava moves reveals variants in edgy frequency not really explicable simply by random sample but rather reflecting organized changes in some place of edgy activity. Pronounced decreases in eruptive activity on Mauna Loa's rift zones assimialte with times of increased lava-lake activity and shield-building at the volcano's summit. Voluminous eruptions of olivine-rich lavas low within the rift zones may include heralded the cessation of summit terme conseille and the resumption of elevated rift sector activity. These types of picrites (i. e. olivine-rich lava) had been possibly engulfed at a time when picritic touches had gone up higher than typical into low supply conduits [Rhodes, 1995], and the eruption low on Mauna Loa's flanks may...

Sources: Barnard, T. M., 95, Mauna Loa Volcano: historical eruptions, query, and observations (1790-1910), in Rhodes, M. M., and Lockwood, M. P. (eds. ), Mauna Loa revealed: structure, structure, history, and hazards: Wa D. C., American Geophysical Union Monograph 92, s. 1-19.

Lipman, P. Watts., 1980, Costs of volcanic activity along the southwest rift zone of Mauna Alabanza Volcano, in Garcia, Meters. O., and Decker, L. W. (eds. ), G. A. Macdonald Special Funeral service Issue, Message of Volcanologique, v. 43, no . four, p. 703-725.

Lockwood, M. P., 95, Mauna Loa eruptive record - the preliminary radiocarbon record, Hawai`i, in Rhodes, J. M., and Lockwood, J. S. (eds. ), Mauna Loor revealed: composition, composition, history, and dangers: Washington Deb. C., American Geophysical Union Monograph 80, p. 81-94.

Rhodes, J. M., 1995, The 1852 and 1868 Mauna Alabanza picrite breakouts: clues to parental magma compositions plus the parental magma, in Rhodes, J. Meters., and Lockwood, J. L. (eds. ), Mauna Loa revealed: framework, composition, background, and problems: Washington M. C., American Geophysical Union Monograph 80, p. 81-94.

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