Papers by Nadia Jimena Velázquez
Quaternary science reviews 83, 143-156, Jan 1, 2014
Palynological, palaeoparasitological and paleobotanical studies of coprolites found in archaeolog... more Palynological, palaeoparasitological and paleobotanical studies of coprolites found in archaeological sites from Perito Moreno National Park (47°57′S72°05′W) yielded information on diet, palaeoenvironment and health. These studies allowed adding evidence to the reconstruction of life history of the hunter–gatherers that inhabited Patagonia during the Holocene. We examined the season of the year when camelid Lama guanicoe coprolites (5400 ± 64 yr 14C BP to 9640 ± 190 yr 14C BP) were deposited at Cerro Casa de Piedra 7 (site CCP7). The study used palynological evidence and comparison with pollen spectra of modern feces collected during summer, fall, winter and spring of 2010. The dominant types were: pollen of Nothofagus, Empetrum rubrum, Asteraceae subfam. Asteroideae, Nassauvia, Caryophyllaceae and Poaceae; fern spores; remains of Eimeria macusaniensis; and plant remains of Poaceae, Festuca pallescens, Stipa speciosa, Armeria maritima, Gaultheria mucronata and E. rubrum. Pollen spectra of modern and fossil feces were used for multivariate analysis. Coprolites associated to fall and winter modern feces. These results and those obtained from pollen concentration values and the presence of pollen types indicators of seasonality, allowed the determination of summer, fall and winter coprolites. However, caution must be taken with the seasonality results of coprolites dated earlier than 9000 years BP since the environmental conditions differed from now. The site was probably a camelid shelter during the unfavorable seasons.
Review of Palaeobotany and Palynology, Sep 15, 2012
Magallania, Punta Arenas, Chile, 2010
Conference Presentations by Nadia Jimena Velázquez
The study of micro and macrobotanical remains allow to infer about vegetation type and to know th... more The study of micro and macrobotanical remains allow to infer about vegetation type and to know the role of vegetable resources in the economy of a society. However, despite presence of plant remains from archaeological contexts represents a great potential for paleoenvironmental reconstructions and assessing past human behavior, its study as a whole is still rare in Patagonian hunter-gatherer archaeological research. The objectives of this work are the integral study of micro and macrobotanical remains, the assessing of taxonomic resolution levels and the contribution offered by each type of proxies. For this purpose, micro and macrobotanical remains (pollen and small plant remains) of human and camelids coprolites, and macrobotanical remains of sediments (wood and charcoal) coming from three stratigraphic levels dated by 14 C and resulting in ages of 9,640 ± 190 years BP, 8,380± 120 years BP and 6,150 ± 105 years BP, of the site Cerro Casa de Piedra 7 were analysed. The results of this study show different taxonomic resolutions. Coprolite pollen analysis allowed the identification of Nothofagus sp., whereas macroremains analysis evidenced the presence of N. pumilio and N. antarctica species. Furthermore, Poaceae pollen was determined whereas microhistological analysis allowed the identification of several species of Poaceae. Also Apiaceae pollen was identified and Azorella monantha were determined by microhistological analysis. The analyses performed in this study enriched the floristic list for each stratigraphic level. These results show the value of multiproxy studies for the integral study of archaeological sites.
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Papers by Nadia Jimena Velázquez
Conference Presentations by Nadia Jimena Velázquez