Revised stratigraphy and eruption rates of Ceboruco stratovolcano and surrounding monogenetic vents (Nayarit, Mexico) from historical documents and new radiocarbon dates
Por:
Sieron, K, Siebe, C
Publicada:
20 sep 2008
Resumen:
More than a dozen new radiocarbon dates reconstruct the eruptive history of Ceboruco volcano. Six of these further constrain previous results for the important plinian Jala eruption, which occurred near 1060+/-55 yr BP. A calibrated radiocarbon age of AD 990-1020 was obtained as best overlap range for all samples. Pottery fragments found directly underneath the pumice deposit indicate that this area was inhabited by human populations that witnessed the eruption. This age therefore represents an important time marker in the prehistory of this region, because an area of >560 km2 was devastated and covered by a thickness of >50 cm of pumice and ash fallout. After the prominent Jala eruption (VEI = 6), at least seven major lava flows and several smaller domes were issued from Ceboruco's crater. Analysis of historical documents allows us to conclude that most of these eruptions took place well before the arrival of the Spanish conquerors to this area in 1528. Ceboruco's last historic erupti
Filiaciones:
Sieron, K:
Univ Nacl Autonoma Mexico, Dept Vulcanol, Inst Geofis, Mexico City 04510, DF, Mexico
Siebe, C:
Univ Nacl Autonoma Mexico, Dept Vulcanol, Inst Geofis, Mexico City 04510, DF, Mexico
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