INVESTIGADORES
MAIDANA Nora Irene
artículos
Título:
Palaeoenvironmental conditions during the Middle Holocene at Isla de los Estados (Tierra del Fuego, 54º, Argentina) and their influence on the possibilities for human exploration.
Autor/es:
FERNÁNDEZ, M.; MAIDANA, N. I.; RABASSA, J.
Revista:
QUATERNARY INTERNATIONAL
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 256 p. 78 - 87
ISSN:
1040-6182
Resumen:
The Middle Holocene is a particular
time period in which there are uneven environmental dynamics all along the
southern portion of the continent. Whereas in the Puna, extreme aridity and
high temperatures (the so-called ?Hypsithermal? period) have been recorded, a
more humid and rainy phase dominated southern Tierra del
Fuego. The present paper explores the palaeoenvironmental
situation of Isla de los Estados (Staaten
Island, 54_380e54_550 S;
63_480e64_460 W) and its relationship with the Archaeological record left
behind by ancient canoeing people. The considered period is characterized by
exceptionally windy conditions. The palaeoenvironmental information could be
used as an explanation for the absence of cultural remains and also for the
scarce archaeological record for Península Mitre. At the beginning of the
Middle Holocene, the diatom record shows a large amount of Aulacoseira sp that
could indicate either windy conditions or higher water levels at the site core.
The more distinctive changes in the diatom assemblages occurred at ca. 5000 cal
B.P., suggesting a shallower water level and more acidic conditions. By 3000
cal B.P., the diatom species are strongly linked to peat and swampy
environments. However, during the late Holocene, milder conditions might have
favored seasonal travelling to t he outer islands of the Fuegian Archipelago,
though no definitive or permanent settlements have been found.