Publication Date:
2021-03-29
Description:
A high-resolution multiproxy geochemical approach was applied to the sediments of Laguna
Potrok Aike in an attempt to reconstruct moist and dry periods during the past 16 000 years in southeastern
Patagonia. The age–depth model is inferred from AMS 14C dates and tephrochronology, and
suggests moist conditions during the Lateglacial and early Holocene (16 000–8700 cal. BP) interrupted
by drier conditions before the beginning of the Holocene (13 200–11 400 cal. BP). Data also imply that
this period was a major warm phase in southeastern Patagonia and was approximately contemporaneous
with the Younger Dryas chronozone in the Northern Hemisphere (12 700–11 500 cal. BP). After
8650 cal. BP a major drought may have caused the lowest lake level of the record. Since 7300 cal. BP, the lake level rose and was variable until the ‘Little Ice Age’, which was the dominant humid period after
8650 cal. BP.
Keywords:
Holocene
;
Younger Dryas
;
Lateglacial
;
`Little Ice Age'
;
lacustrine sediments
;
geochemistry
;
tephrochronology
;
multiproxy approach
;
Patagonia
;
Argentina.
;
551
Language:
English
Type:
article
,
publishedVersion
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