Some Problems and Implications of14C Dates from a Podzol Buried Beneath an end Moraine at Haugabreen, Southern Norway
作者:
MatthewsJohn A.,
期刊:
Geografiska Annaler: Series A, Physical Geography
(Taylor Available online 1980)
卷期:
Volume 62,
issue 3-4
页码: 185-208
ISSN:0435-3676
年代: 1980
DOI:10.1080/04353676.1980.11880009
出版商: Taylor&Francis
数据来源: Taylor
摘要:
ABSTRACTEight14C dates have been obtained from a 5 cm thick Ah, horizon of a podzol soil buriedin situbeneath the outermost end moraine of the Haugabreen gletschervorfeld, southern Norway. The dates ranged from 880±35 to 3140±55“C years B.P.; a strong increase in age with depth was indicated; various fractions of soil organic matter were found to differ significantly in age. Ten problems in the interpretation of these results were considered. Date of burial of the palaeopodzol was discussed using multiple working hypotheses, assuming different forms of age/depth relationship and the presence or absence of contamination. Burial during the“Little Ice Age”is most likely, although a conservative maximum estimate of time elapsed since burial is given as 140014C years. The recognition of numerous and precisely dated pre-“Little Ice Age”Neoglacial glacier maxima on the basis of14C dates from well-developed palaeosols is criticized. Apparent mean residence times within such soils are likely to increase steeply with depth and may be of the order of 1000 years within the top 2.5 cm. Some other pedological implications are outlined; it is inferred that at least 3000 years were required for formation of this soil horizon.
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