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Your search keyword '"Dillenburg, Sergio R."' showing total 22 results
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22 results on '"Dillenburg, Sergio R."'

19. Moluscos holocênicos em sedimentos lagunares associados à barreira arenosa da Pinheira-Guarda-Gamboa, Santa Catarina: implicações paleoambientais

Author

CANCELLI, Rodrigo R., TESTA, Ericks H., HADLER, Patrícia, SAAFELD, Kay, BARBOZA, Eduardo G., and DILLENBURG, Sergio R.

Subjects
Quaternário, planície costeira, nível do mar, evolução costeira, Quaternary, coastal plain, sea-level, coastal evolution
Abstract

This paper documents the occurrence of mollusk carbonate fossils in sediments of the backbarrier of the Pinheira-Guarda- -Gamboa beaches, Santa Catarina Coastal Plain, southern Brazil, in which five species of gastropods and nine of bivalves were recognized. Among the bivalves, four species were articulated, Ostrea equestris, Anomalocardia brasiliana, Lucina pectinata and Tagelus plebeius, and the last three were found in life position. Radiocarbon datings were performed on articulate and life position specimens: Lucina pectinata, indicating a conventional age of 5.260 ± 30 years BP. (calibrate age 5.620 - 5.440), Tagelus plebeius, 5.620 ± 30 years BP. (calibrate age 6.000 - 5.840) and Ostrea equestris articulate, 5.410 ± 30 years BP. (calibrate age 5.805 - 5.580), indicating the material in the middle Holocene. The topographic data gathered with precision equipment established that the top of the outcrop is 2 m above the relative sea-level. The fossil association suggests lagoon-estuarine environment subsequently filled in response to a lowering of the sea level., Este trabalho documenta a ocorrência de moluscos fósseis carbonáticos em sedimentos da retrobarreira das praias da Pinheira-Guarda-Gamboa, Planície Costeira de Santa Catarina, sul do Brasil, onde foram reconhecidas cinco espécies de gastrópodes e nove de bivalves. Dentre os bivalves, identificaram-se quatro espécies articuladas, Ostrea equestris, Anomalocardia brasiliana, Lucina pectinata e Tagelus plebeius, as três últimas registradas em posição de vida. Datações radiocarbônicas foram realizadas em espécimes articulados e em posição de vida: Lucina pectinata apontando idades convencionais de 5.260 ± 30 anos AP (idade calibrada 5.620 - 5.440), Tagelus plebeius, 5.620 ± 30 anos AP (idade calibrada 6.000 - 5.840) e Ostrea equestris apenas articulado, 5.410 ± 30 anos AP (idade calibrada 5.805 - 5.580), posicionando o material no Holoceno médio. O dado topográfico com equipamento de precisão estabeleceu que o topo do afloramento encontra- -se a 2 m acima do nível relativo atual do mar. A associação indica um ambiente lagunar-estuarino, posteriormente colmatado como resposta ao rebaixamento do nível do mar.

Published
2017

22. Calibrating Holocene human–environment interactions using ancient narratives: The example of Ngurunderi in South Australia.

Author

Nunn, Patrick D., Luebbers, Roger, Hesp, Patrick A., Murray-Wallace, Colin V., Wilson, Christopher, Bourman, Robert P., Roberts, Amy, Moffat, Ian, Miot da Silva, Graziela, Dillenburg, Sergio R., Tamura, Toru, and Reilly, Mark

Abstract

AbstractThe essence of stories of human–environment interactions can be preserved in oral contexts for millennia, creating novel opportunities for humanizing the past. This study examines stories (knowledge-rich narratives) about the ancestral being Ngurunderi, told by Ngarrindjeri peoples of South Australia. Three elements of the Ngurunderi narrative are considered. The first recalls his journey along a 170-km long coastal barrier (Younghusband Peninsula) when this was continuous. The second discusses Ngurunderi’s encounters with what are now islands off the Fleurieu Peninsula, some of which he created, interpreted as memories of when sea level was lower and “islands” were contiguous with the mainland. The third refers to the crossing of a land connection between modern Kangaroo Island and the Fleurieu Peninsula, later submerged to form Backstairs Passage. Using paleogeographic data, the most recent times at which each narrative element could have taken place and observed by people are estimated. This research suggests that: (1) stories about Younghusband Peninsula may be >6700 years cal BP; (2) islands off the Fleurieu Peninsula were created 6800–10,400 cal BP; and (3) submergence of Backstairs Passage occurred 11,000–10,100 cal BP. Narratives are linked to the period of early Holocene sea-level rise, the rapid 8200-cal BP sea-level rise event, and stabilization of sea level 7000–6000 cal BP. These narratives humanize the past and provide information that can be interpreted as both observed coastal and seascape changes as well as past human responses to rising sea level that can inform our future encounters with coastal-landscape change. [ABSTRACT FROM AUTHOR]

Published
2024
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