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Radiocarbon Dates for Lava Flows and Pyroclastic Deposits on São Miguel, Azores

Published online by Cambridge University Press:  18 July 2016

Richard B Moore  and
Meyer Rubin
Richard B Moore
Affiliation:
US Geological Survey, Federal Center, MS 903, Denver, Colorado 80225
Meyer Rubin
Affiliation:
US Geological Survey, National Center, MS 971, Reston, Virginia 22092
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We report 63 new radiocarbon analyses of samples from São Miguel, the largest (ca 62 × 13km) and most populous (ca 150,000 inhabitants) island in the Azores archipelago (Fig 1). The samples are mainly carbonized tree roots and other plant material collected from beneath 20 mafic lava flows and spatter deposits and from within and beneath 42 trachytic pyroclastic flow, pyroclastic surge, mudflow, pumice-fall, and lacustrine deposits and lava flows. One calcite date is reported. The samples were collected during geologic mapping of the entire island (Moore, in press A; sample locations are shown on this map). Nine 1:25,000-scale topographic maps, published in 1983 by the Portuguese Army Cartographic Service, cover the island; samples and locations described below refer to these named sheets.

Type
Date Lists
Information
Radiocarbon , Volume 33 , Issue 1 , 1991 , pp. 151 - 164
Copyright
Copyright © The American Journal of Science 

References

Booth, B, Croasdale, R and Walker, GPL 1978 A quantitative study of five thousand years of volcanism on São Miguel, Azores. Royal Soc [London] Philos Trans 288: 271–319.Google Scholar
Gandino, A, Guidi, M, Merlo, C, Mete, L, Rossi, R and Zan, L 1985 Preliminary model of the Ribeira Grande geothermal field (Azores Islands). Geothermics 14: 91–105.CrossRefGoogle Scholar
Moore, RB, in press A, Geologic map of São Miguel, Azores. US Geol Survey Misc Inv Map I-2007, scale 1:50,000.Google Scholar
Moore, RB, in press B, Volcanic geology and eruption frequency, São Miguel, Azores. Bull Volcanol. Google Scholar
Padang, MN van, Richards, AF, Machado, F, Bravo, T, Baker, PE and Le Maitre, RW 1967 Catalogue of active volcanoes-Atlantic Ocean. Internatl Volcanol Assoc 21.Google Scholar
Shotton, FW, Blundell, DJ and Williams, REG 1968 Birmingham University radiocarbon dates II. Radiocarbon 10(2): 200–206.CrossRefGoogle Scholar
Shotton, FW, Blundell, DJ and Williams, REG 1969 Birmingham University radiocarbon dates III. Radiocarbon 11(2): 263–270.CrossRefGoogle Scholar
Shotton, FW and Williams, REG 1971 Birmingham University radiocarbon dates V. Radiocarbon 13(2): 141–156.CrossRefGoogle Scholar
Shotton, FW and Williams, REG 1973 Birmingham University radiocarbon dates VII. Radiocarbon 15(3): 451–468.CrossRefGoogle Scholar
Walker, GPL and Croasdale, R 1970 Two Plinian-type eruptions in the Azores. Jour Geol Soc London 127: 17–55.CrossRefGoogle Scholar
Weston, FS 1964 List of recorded volcanic eruptions in the Azores with brief reports. Bol Mus Lab Min Geol Fac Cien 10: 3–18.Google Scholar