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Landsat Thematic Mapper observations of debris avalanche deposits in the Central AndesRemote sensing with the Landsat Thematic Mapper of debris avalanche deposits in the Central Andes between 18 and 27 deg S revealed, for the first time, the presence of 28 breached volcanic cones and 11 major volcanic debris avalanche deposits, several of which cover areas in excess of 100 sq km. It is concluded that such avalanche deposits are normal products of the evolution of large composite volcanoes, comparable with lava and pyroclastic flow deposits. A statistical survey of 578 composite volcanoes in the same area indicated that a majority of cones which achieve edifice heights between 2000 and 3000 m may undergo sector collapse. The paper describes morphological criteria for identifying breached composite cones and volcanic debris avalanches using orbital images.
Document ID
19890032467
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Francis, P. W.
(Lunar and Planetary Inst. Houston, TX, United States)
Wells, G. L.
(Lunar and Planetary Institute Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Bulletin of Volcanology
Volume: 50
ISSN: 0258-8988
Subject Category
Earth Resources And Remote Sensing
Accession Number
89A19838
Funding Number(s)
CONTRACT_GRANT: NAGW-1167
CONTRACT_GRANT: NAS5-28759
CONTRACT_GRANT: NASW-4066
Distribution Limits
Public
Copyright
Other

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