Publication: Repeated debris avalanches on Tenerife and genesis of
Las Cañadas caldera wall (Canary Islands)
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Publication Date
1999
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Geological Society of America
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Abstract
Geologic evidence on Tenerife, Canary Islands, indicates six successive north-directed
debris avalanche events, including: the Anaga and Teno (ca. 6 Ma) events that affected the old
basaltic series, and the Tigaiga (>2.3 Ma), Roques de García (possibly 0.6–0.7 Ma), Orotava
(ca. 0.6 Ma), and Icod (<0.15 Ma) avalanche events that affected the Cañadas and Dorsal volcanic
edifices. The approximate total volume (>1000 km3) inferred for these events can account
for the volume of previous estimates of offshore volcanic debris. These repeated flank failures
can also account for the present morphology of Las Cañadas caldera wall, which partly bounds
a multiepisodic lateral-collapse structure 25 km wide.