The lateral facies of ignimbrites at Laacher See volcano
نویسندگان
چکیده
منابع مشابه
Volcano Instability and Lateral Collapse
Active volcanoes are dynamically evolving structures, the life-cycles of which are punctuated by episodes of flank instability and lateral failure. Such behaviour is now recognised as ubiquitous and lateral collapses are estimated to have occurred at least four times a century over the past 500 years. In the Andes, three quarters of the large volcanic edifices have experienced collapse, while o...
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High-spatial-resolution (230Th)/(238U) disequilibrium dating reveals rapid zircon crystallization prior to the 12,900 yr B.P. Laacher See (Germany) phonolite eruption. Zircons from Lower Laacher See tephra (LLST) and syenitic subvolcanic nodules share REE and low U/Th characteristics and define an isochron age of 17.1 1.3 ka (1 ). Zircons also show higher initial (Th)/(Th)0 and oxygen isotopic ...
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ژورنال
عنوان ژورنال: Bulletin of Volcanology
سال: 1990
ISSN: 0258-8900,1432-0819
DOI: 10.1007/bf00304099