Volcanism on Mars
نویسنده
چکیده
Amazonian The youngest of the geologic epochs on Mars identified through geoiogic mapping of superposition relations, and the area! density of impact craters. caldera An irregular collapse feature formed over the evacuated magma chamber within a volcano. central volcano Emplacement of volcanic materials from a centralized source vent rather than along a distributed line of vents, composite volcano A volcano consisting of intermixed effusive lava flows and pyroclastic materials. Flank slopes are tyjjically >10'', or more than twice as steep as the flanks of a shield volcano. Fossae Descriptor applied to an aligned series of fractures in a planetary surface. Hesperian The intennediate geologic epoch on Mars identified through geologic mapping of superposition relations, and the areal density of impact craters. Icelandite Volcanic rock with silica content comparable to an andésite, but which did not form as a result of subduction or orogenic processes, Mons Descriptor applied to a large isolated mountain on a planetary surface, Noachian The oldest of the geologic epochs on Mars identified through geologic mapping of superposition relations, and the areal density of impact craters. Patera Descriptor applied to an irregular or complex crater with scalloped edges, surrounded by shallow flank slopes. pseudocrater A "rootless vent" created by the interaction of lava with groundwater or wet sediments beneath the flow. shield volcano A broad volcanic construct consisting of multitudes of lava flows. Flank slopes are typically •5°, or less than half as steep as the flanks on a composite volcano, SNC meteorites .A group of meteorites thought to originate on Mars, due to a relatively young age and trapped gases very like the atmosphere of Mars. The acronym is derived from the names of the three meteorites that define the major subdivisions identified within the group: S, Shergotty; N, Nakhta; C, Chassigny.
منابع مشابه
Mevtv Workshop on the Evolution of Magma B©dies on Mars
A Comparison of Theoretical Inferences for Magmatic Supply on Mars S. Baloga Relative Ages of Martian Volcanoes N. G. Barlow Martian Mantle Primary Melts C M. Bertka, Z R. Holloway, and V. Pan Magmatic Sulfides on Mars R. G. Bums Constraints on Eruption Rates and Cooling of Three Lava Flows at Alba Z Crisp Hadriaca Patera: Evidence for Pyroclastic Volcanism in the Hellas Region of Mars D.A. Cro...
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