Journal
QUATERNARY INTERNATIONAL
Volume 397, Issue -, Pages 541-554Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.quaint.2015.04.021
Keywords
Holocene; Izu Peninsula; Emerged sessile assemblages; C-14 ages; Co-seismic uplift; Scoria layer
Funding
- Strategic Funds for the Promotion of Science, Technology
- Japan Society for Promotion of Science [26287126]
- Network of Universities in Shizuoka
- Grants-in-Aid for Scientific Research [26800266, 15KK0151, 26247085, 26287126] Funding Source: KAKEN
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Faunal compositions and C-14 ages of emerged sessile assemblages at four sites in the southern part of Izu Peninsula, central Japan, indicate that co-seismic uplift occurred at 1256-950 BC, AD 1000-1270, AD 1430-1660, and AD 1506-1815. The data suggest that the stress field in the southern part of Izu Peninsula changed to its current north-south compression at ca. 3100 BP, and that the recurrence intervals for uplift-inducing earthquakes have become shorter during the last 1000 years. The main faults responsible for this seismicity appear to be located offshore from the south part of Izu Peninsula. This study also examined a 1-cm-thick scoria layer deposited between 6940 and 6810 cal BP in the south part of Izu Peninsula. The layer, which had not been previously examined petrographically, consists of scoria grains derived from Izu-Oshima volcano located 40 km east of the study area, rather than from volcanoes located on Izu Peninsula itself. (C) 2015 The Authors. Published by Elsevier Ltd and INQUA.
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