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Browsing by Subject "lava dome"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zasięg i budowle wulkaniczne grupy Andahua
    (Wydawnictwa AGH, 2008) Gałaś, Andrzej
    In 2003,2004 and 2006 small groups of geologists of AGH - The University of Science and Technology in Kraków investigated young Andahua volcanic group of Southern Peru. It was identified first some 45 years ago but its extension is not definitely determined yet. The greatest area of the Andahua group, where at the same time the volcanism products are the most common, is the Valley of Volcanoes. This valley, between the Misahuanca and Ayo, is covered by a dense cover of lava, which is about 60 km long. Field work resulted in discovery of about 150 individual emission centres: apparent pyroclastic cones 50-300 metres high, and usually smaller lava domes and vents controlled by fractures. Morphology of the Andahua lava flows coalescing into composite lava fields as well as criteria for their stratigraphy and tectonic controls are given.