Paulo DeBlasis

Sambaqui (Shell Mound) Societies of Coastal Brazil

Sambaquis (the Brazilian term for shell mounds, derived from the Tupi language) are widely distributed along the shoreline of Brazil and were noted in European accounts as early as the sixteenth century. They typically occur in highly productive bay and lagoon ecotones where the mingling of salt and fresh waters supports mangrove vegetation and abundant shellfish, fish, and aquatic birds. More than one thousand sambaqui locations are recorded in Brazil’s national register of archaeological sites [Note 1], but represent a fraction of the original number because colonial through modern settlements coincide with these favorable environments. Although sambaquis are of variable scale overall, massive shell mounds are characteristic of Brazil’s southern coast (Figure 18.1). The term “sambaqui” is applied to cultural deposits of varying size and stratigraphy in which shell is a major constituent, undoubtedly encompassing accumulations with a range of functions and origins. Proportions of soil, sand, shell [Note 2], and the kinds of cultural inclusions and features in sambaquis also are variable. Small sambaquis often consist of shell layers over sandy substrates or sequences of shell and sand layers, with or without signs of burning or significant numbers of artifacts. Larger shell mounds typically have horizontally and vertically complex stratigraphy, including alternating sequences of shell deposits, narrower and darker layers of charcoal and burned bone that mark occupation surfaces, and clusters of burials, hearths, and postholes descending from these surfaces. Food refuse is present in sambaquis, along with a set of several feature types that are commonplace in residential occupations. Recognizable dwellings have not been encountered, however, nor do arrangements of features and distributions of artifacts indicate sustained domestic activity, with very few exceptions (e.g., around lakes in the state of Rio de Janeiro: Barbosa et al. 1994; L. Kneip 1992). In some cases, small sambaquis with

Long-Term Resilience of Late Holocene Coastal Subsistence System in Southeastern South America

Isotopic and molecular analysis on human, fauna and pottery remains can provide valuable new insights into the diets and subsistence practices of prehistoric populations. These are crucial to elucidate the resilience of social-ecological systems to cultural and environmental change. Bulk collagen carbon and nitrogen isotopic analysis of 82 human individuals from mid to late Holocene Brazilian archaeological sites (∼6,700 to ∼1,000 cal BP) reveal an adequate protein incorporation and, on the coast, the continuation in subsistence strategies based on the exploitation of aquatic resources despite the introduction of pottery and domesticated plant foods. These results are supported by carbon isotope analysis of single amino acid extracted from bone collagen. Chemical and isotopic analysis also shows that pottery technology was used to process marine foods and therefore assimilated into the existing subsistence strategy. Our multidisciplinary results demonstrate the resilient character of the coastal economy to cultural change during the late Holocene in southern Brazil.

Building Coastal Landscapes: Zooarchaeology and Geoarchaeology of Brazilian Shell Mounds

ABSTRACT Brazilian shell sites are largely considered to have been multifunctional and the location of both sacred and secular activities. This article explores the joint contribution that zooarchaeological and geoarchaeological analysis can bring to understanding the depositional history of shell sites and their functions. This combined approach is applied to the study of two shell mounds that represent important aspects of the diverse array of shell sites found along the southern Brazilian coast. Jabuticabeira II is a monumental shell mound that has shown unquestionable evidence of being used mainly as a cemetery, and Encantada III is a smaller shell deposit whose function is more difficult to define. Research focusing on formation processes at Jabuticabeira II played an important role in developing a better understanding of the mortuary rituals performed at the site. In Encantada III, zooarchaeology and geoarchaeology contribute to a better characterization of its role as a short-term deposit of long-lasting permanence. Both shell sites and their practical and symbolical attributes represent examples of the complex dynamics of the anthropic construction of a landscape.

Interações entre evolução sedimentar e ocupação humana pré-histórica na costa centro-sul de Santa Catarina, Brasil

Since the beginning of the human occupation in the south-central coast of Santa Catarina State, in Brazil, the articulation between natural and anthropic processes modeled a strongly domesticated landscape, shaped by the massive construction of shell mounds of monumental dimensions and millenarian permanence. In the coastal plain between Passagem da Barra (Laguna District) and Figueirinha Lake (Jaguaruna District), 76 sambaquis were mapped, 48 of which have been dated. Systematic site surveys and radiocarbon datings allowed identifying patterns of spatial distribution in sambaquis according to the sedimentary context at the time of construction, stratigraphy and age. Based on these criteria, the following groups were recognized: five geological-geomorphological contexts of location; three stratigraphic patterns; and four phases of sambaqui occupation in the area, based on site number and type of constructive pattern. The model for sedimentary evolution and time-space distribution of sambaquis shows that sites were built in already emerged areas and that inland sites, away from the lagoons, may have not be preserved or they are not exposed due to the continuous sedimentary filling that characterized this region after the maximum Holocene transgression. The crossing of data, here proposed, shows the importance of integral approaches between archaeology and geosciences for the study of landscape evolution.

Traditional Fishing, Mollusk Gathering, and the Shell Mound Builders of Santa Catarina, Brazil

Abstract This article presents results of ethnographic research on modern fishers and mollusk gatherers from the state of Santa Catarina, in southern Brazil. Information from interviews is correlated with questions regarding the lifeways of groups that built large shell mounds along the Brazilian coast between 6,000 and 1,000 years ago. Ethnoarchaeological research helps deconstruct misconceptions regarding these prehistoric communities, demonstrating that large-scale sedentary groups could have successfully utilized estuarine resources on a year-round basis.

Understanding the Chronology and Occupation Dynamics of Oversized Pit Houses in the Southern Brazilian Highlands.

A long held view about the occupation of southern proto-Jê pit house villages of the southern Brazilian highlands is that these sites represent cycles of long-term abandonment and reoccupation. However, this assumption is based on an insufficient number of radiocarbon dates for individual pit houses. To address this problem, we conducted a programme of comprehensive AMS radiocarbon dating and Bayesian modelling at the deeply stratified oversized pit House 1, Baggio I site (Cal. A.D. 1395–1650), Campo Belo do Sul, Santa Catarina state, Brazil. The stratigraphy of House 1 revealed an unparalleled sequence of twelve well preserved floors evidencing a major change in occupation dynamics including five completely burnt collapsed roofs. The results of the radiocarbon dating allowed us to understand for the first time the occupation dynamics of an oversized pit house in the southern Brazilian highlands. The Bayesian model demonstrates that House 1 was occupied for over two centuries with no evidence of major periods of abandonment, calling into question previous models of long-term abandonment. In addition, the House 1 sequence allowed us to tie transformations in ceramic style and lithic technology to an absolute chronology. Finally, we can provide new evidence that the emergence of oversized domestic structures is a relatively recent phenomenon among the southern proto-Jê. As monumental pit houses start to be built, small pit houses continue to be inhabited, evidencing emerging disparities in domestic architecture after AD 1000. Our research shows the importance of programmes of intensive dating of individual structures to understand occupation dynamics and site permanence, and challenges long held assumptions that the southern Brazilian highlands were home to marginal cultures in the context of lowland South America.

Radarfacies and sedimentological analysis: Study of sedimentary substrate from an archaeological site (shell mound), southern Brazil

Integrated results of GPR (Ground Penetrating Radar) and sedimentological analysis are presented for the Jabuticabeira II archaeological site (shell mound), Santa Catarina, Brazil. By means of radarfacies identification, this study aims to delimit the archaeological site and differentiate the coastal depositional systems that compose its substrates. For these purposes, available models of the temporal–spatial distribution of depositional systems in the area were used and sedimentological analysis (granulometry, quantification of heavy minerals and clay-mineral characterization) were performed on samples spaced at 0.5-m vertical intervals in auger drills cutting the identified radarfacies. GPR data were obtained along a radial grid, which allowed the rapid mapping of a large area (several hundred square metres). The results allowed to characterize an archaeological layer, the soil and two sedimentary layers (palaeolagoon and aeolian) in the substrates under and around the site. The high porosity and the grain size, cementation and heavy mineral segregation contrasts along wind-controlled laminations are for the reflector sharpness in the aeolian deposits. The archaeological site settlement mostly overlies the palaeolagoon, which was a newly emerged land during the epoch of occupation and is situated on the margins of aeolian deposits that formed in the region after the Holocene maximum flooding. This configuration reinforces the sambaquis occupation model of south-central Santa Catarina during the Holocene, strongly controlled by the proximity to lagoon bodies. The resolution of the data in this study was sufficient to advance our understanding of the regional sedimentary evolution and its relation with sambaqui occupation.

GPR applied to map Jabuticabeira-II coastal sambaqui archaeological site (Brazil)

In this work, some GPR results obtained in Jabuticabeira-II coastal sambaqui archaeological site, located in Jaguaruna region, Santa Catarina state, southern Brazil, are presented. Sambaqui is a word in Guarani (Native South American language) that means: Tamba - shells, and Qui - conic mound, or shell mound. GPR profiles present interesting anomalous reflectors most likely related to archaeological interest targets. GPR depth slices exhibit anomalies with high amplitude probably related to point reflectors. In order to give greater reliability for real result interpretations, 2D FDTD numerical modelling was accomplished, and it shows good agreement with real data obtained in the field. Then, real and synthetic results results as reference guide to archaeological excavation activities. Archaeologist from Universidade de Sao Paulo excavated Jabuticabeira-II site after GPR results analysis. Horizontal reflectors were related to sambaqui structure, and its bottom, characterized by rich archaeological layers as well as water table level. Anomaly typified by hyperbolic reflection pattern was associated with a concentration of carbonatic shells, from 3160 to 2850 cal yBP. GPR results were very important for archaeological research in development allowing adjusting excavation, and guarantee this research success.