PALEOENVIRONMENTAL RECORDS INFLUENCED BY SEA LEVEL VARIATIONS DURING THE HOLOCENE IN THE VITORIA BAY REGION, ESPIRITO SANTO STATE, BRAZIL

作者：de Freitas Alex da Silva^*; Barreto Cintia Ferreira; Bastos Alex Cardoso; Baptista Neto Jose Antonio

来源：Radiocarbon, 2017, 59(4): 1087-1102.

DOI：10.1017/RDC.2017.46

• continental palynomorphs
• carbonized particles
• Holocene
• stable isotopes
• vegetation

Vitoria Bay is located in the south-central part of the State of Espirito Santo (SES). Multiproxy analyses were performed on samples from a 490-cm-long sediment core collected at the coordinates 40 degrees 1823W and 20 degrees 1448S. The objective of this study was to identify and integrate the multiproxy data to determine the environmental dynamics during the Holocene. The material was subsampled every 10 m and submitted to standard methodological processing. The sediment core was dated to two depths: the oldest age was between 9396 and 9520 cal yr BP at a 480-cm depth, and the youngest age was from 7423 to 7511 cal yr BP at a 304-cm depth. The integrated analysis revealed evidence of three major environmental changes in Vitoria Bay. The first phase had a fluvial influence (depth of 490-480 cm; 9396-9520 cal yr BP). This was followed by a transitional period (depth of 480-290 cm; 7423-7511 cal yr BP) with a salt influence due to the Last Marine Transgression (LMT). Later, the environmental stability was similar to that of today (290 cm to the core top). This was a reflection of the Last Marine Regression (LMR) in the Holocene.

• 出版日期2017-8