Resumen

COLOBIG, María de los Milagros et al. Registros biosilíceos en sitios arqueológicos de las sierras de Tandilia Oriental, Argentina (Pleistoceno Tardío-Holoceno Tardío): Consideraciones paleoambientales. Rev. Mus. Argent. Cienc. Nat. [online]. 2016, vol.18, n.1, pp.39-52. ISSN 1853-0400.

The biosiliceous records from two archaeological sites - Abrigo Los Pinos (LPn) and Abrigo La Grieta (LG) - located in the eastern Tandilia range (Pampean region, Argentina) are analyzed. Human occupations in these sites contain a high diversity of archaeological remains (lithic, ceramic, bones, mineral pigments, charcoal and rock art). The long sequences, which span from the late Pleistocene to the late Holocene allow us to study the palaeonvironmental setting of early occupations. Phytolith assemblages from the middle sections in both profiles are dominated by panicoid elements, indicating temperate (LG) and warm conditions (LPn), coinciding with moments of greatest human occupation sites (Holocene in LG and early to middle Holocene in LPn). However, at basal and top levels of the sequences, environments are dominated by drier and cooler episodes which are mainly alternated by wet conditions in LG. The present analysis brings information about the plant component along the sequences and estimates that microenvironmental conditions inside the caves were fluctuating and comparable between anthropic levels.

Palabras clave : Biosiliceous microremains; Archaeological sites; Eastern Tandilia range; Pleistocene- Holocene transition Holocene.

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