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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
1999
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| Online Access: | https://www.redalyc.org/articulo.oa?id=56838403 |
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Table of Contents:
- The magnetic record of the Late Glacial-Holocene transition in sediments from Grandfather Lake (Southwest Alaska) Pieter A. Vlag Subir K. Banerjee Ciencias de la Tierra Alaska Quaternary lake sediments Grandfather Lake Magnetic properties Preliminary rock magnetic measurements on a 8.5 m long sediment core from Grandfather Lake, southwest Alaska, indicatethat the remanence in these sediments is carried by large multi-domain magnetite grains. This suggests a detrital magneticsignal. An abrupt change in magnetic properties at 5.95 m depth (ca. 9500 14C yr.) probably reflects the beginning of the temperateHolocene. The magnetic and pollen records show different patterns below this transition. The latter suggests the occurrence of afirst slight warming at the end of the Late Glacial period, followed by the Younger Dryas cooling event and the actual beginningof the Holocene. Neither the first warming event nor the Younger Dryas are recorded in the magnetic signal. One of the explanationsfor this discrepancy is that the impact of these climate events, if any, may have been limited in this region. 1999 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56838403 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.4 Vol.38