CHARACTERIZATION OF THE WATER SEDIMENTARY CONDITIONS OF ITAPUÃ BEACH, SALVADOR-BAHIA, DURING THE 2014 RAINY SEASON
Marcus Vinicius Peralva Santos
Trainer professor at the State
University of Bahia (UNEB) and researcher at the Laboratory of the Foraminifera
Study Group at the Federal University of Bahia (GEF-UFBA), graduated in
Biological Sciences from the Jorge Amado University Center (UNIJORGE), master
and doctor in Geology from the UFBA. Email: imperalva@hotmail.com
Maili Correia Campos
Researcher at the Laboratory of the
Foraminifera Study Group at the Federal University of Bahia (GEF-UFBA),
graduated in Biological Sciences at UFBA, Master in Biometry at the Federal
Rural University of Pernambuco (UFRPE) and PhD in Geology at UFBA. Email:
maicampos@hotmail.com
Simone Souza de Moraes
Associate Professor IV of the
Department of Oceanography and permanent professor of the Graduate Program in
Geochemistry: Petroleum and Environment (POSPETRO), both at the Institute of
Geosciences of the Federal University of Bahia. Leader of the Foraminifera
Study Group (GEF-UFBA). Graduated in Biological Sciences and master's and
doctorate in Geology from UFBA. E-mail: smoraes@ufba.br
ABSTRACT
Bioclasts
correspond to limestone skeletal remains of marine and/or freshwater organisms,
which have a recognizable surface feature, and which therefore can be used in
order to characterize the aquatic environment in terms of its hydrodynamics.
Based on this aspect, this article aimed to characterize the hydro-sedimentary
conditions of Itapuã beach, located in the city of Salvador - Bahia, using the
biogenic/bioclast components of the sediment as descriptors. As for
methodological aspects, 30 samples of surface sediments were collected, these
points being distributed along the beaches of Farol de Itapuã, Rua K, Quiosque
da Janaína and Sereia, 20 parallel to the beach face equidistant in 120m and 10
perpendicular with 50m of distance between the points, which were washed and
dried in the laboratory and analyzed for their bioclastic composition,
taphonomy, distribution, granulometry and calcimetry. As for the results, it
was possible to group the bioclasts into 16 biogenic categories, with the
calcareous algae category (>55%) being the most abundant. A heterogeneous
distribution was found, with a predominance of autochthonous grains, mottled in
color, with abrasion, with rounding level 3 and relics, indicating that the
surface sediments are being reworked in the analyzed area. Low carbonate values
(> 48%) indicate a greater siliciclastic contribution and the predominance
of the fine sand fraction indicates low hydrodynamics.
Keywords : Biogenic components. rainy season. Itapua beach.
Reviewed by Current Scientific Journal
on
abril 08, 2023
Rating:
