期刊
HOLOCENE
卷 14, 期 5, 页码 780-786出版社
ARNOLD, HODDER HEADLINE PLC
DOI: 10.1191/0959683604hl757rr
关键词
tephra; tephrochronology; wiggle-matching; peat; first millennium BC; Ireland
Three distinct, first millennium BC tephras (BMR-190, OMH-185, GB4-150) have been recognized in Irish peat deposits, including a previously undated ash (BMR-190). We present the results of a programme of high-precision C-14 wiggle-matching on a peat profile containing all three tephras from Glen West, County Fermanagh, Northern Ireland. The wiggle-match provides highly refined dates of 705-585 cal. BC for BMR-190, 755-680 cal. BC for OMH-185 and 800-758 cal. BC for GB4-150. The tephras constitute valuable, widespread isochrones for palaeoecological research across the first millennium BC, when a prolonged (14) C calibration plateau between 750 and 400 cal. BC presents a major problem to dating and correlating palaeoenvironmental events from multisite, multiproxy studies of the period.
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