Sample records for foraminifera
from WorldWideScience.org

Sample records 1 - 5 shown.



1

Interpretações paleoambientais obtidas a partir das variações na coloração das carapaças de foraminíferos, da Enseada do Flamengo, SP/ Paleoenviriomental interpretation based on variations of the color of foraminifera carapaces, Flamengo bay, Ubatuba, São Paulo

Duleba, Wânia
1994-12-01

Resumo em português Dois testemunhos obtidos no Saco da Ribeira e Saco do Perequê-Mirim, locais situados na Enseada do Flamengo, foram estudados. No primeiro local foram observadas muitas carapaças de foraminíferos preenchidas por pirita. No outro local, além das carapaças preenchidas por pirita, foram notadas carapaças impregnadas com limonita e monossulfeto de ferro, as quais se relacionaram com níveis fortemente bioturbados. Essas informações mostraram que o Saco da Ribeira é ca (mais) racterizado por condições mais redutoras do que no Saco do Perequê-Mirim. Através da quantificação de carapaças de foraminíferos impregnadas com hidróxido/óxido e/ou preenchidos por sulfeto ferroso foi possível estimar algumas diferenças em potenciais de oxirredução desses dois locais na Enseada do Flamengo. Resumo em inglês Two cores obtained respectively from Saco da Ribeira and Saco do Perequê-Mirim, both located within Flamengo Bay, northern coast of São Paulo, Brazil, have been studied. At former site many pyrite- filled foraminifera carapaces were observed. At the other site, there occur carapaces filled with pyrite, as well as carapaces impregnated with limonite and iron monosulfide, the latter showing a close relationship between limonite and iron monosulfide impregnated carapaces w (mais) ith strongly bioturbated levels. These observations reveal more reducing conditions in the Saco da Ribeira than in the Saco do Perequê-Mirim. By quantifying the number of carapaces impregnated with hydroxide/oxide vs. those filled by ferrous sulfide, it was possible to estimate some differences in redox potenciais at these two sites.

Scientific Electronic Library Online (Portuguese)

2

The dynamic balance between food abundance and habitat instability: benthic foraminifera of Portuguese margin canyons

Koho, K.A.

Submarine canyons are dynamic sedimentary environments influenced by sediment transport, erosion and deposition. Gravity flows can scour and erode the canyon floor, thus redistributing sediment to distal locations. In addition, submarine canyons can act as sedimentary traps where sediment transporte...

DRIVER (Portuguese)

3

Os topónimos algarvios na Paleontologia portuguesa

Rocha, R. B.; Kullberg, J. C.; Caetano, P. S.

DRIVER (Portuguese)

4

Ocean climate variability in the eastern North Atlantic during interglacial marine isotope stage 11: A partial analogue to the Holocene?

de Abreu, C; Abrantes, FF; Shackleton, NJ; Tzedakis, PC; McManus, JF; Oppo, DW; Hall, MA

[ 1] Similar orbital geometry and greenhouse gas concentrations during marine isotope stage 11 ( MIS 11) and the Holocene make stage 11 perhaps the best geological analogue period for the natural development of the present interglacial climate. Results of a detailed study of core MD01-2443 from the ...

DRIVER (Portuguese)

5

Aspectos gerais sobre a alimentação do cangulo, Balistes vetula Linnaeus, 1758 (Pisces - Balistidae) no estado de Pernambuco - Brasil

Costa, Técio Luiz Macêdo; Vasconcelos Filho, Antônio de Lemos; Galiza-Viana, Elza Maria Braga
1987-01-01

Resumo em inglês The Balistidae, especially Balistes vetula are commom fishes in tropical waters from Northeastern Brazil. Studies about these fishes captured at the coastal area of Recife between Pina; Boa Viagem, Piedade and Candeias beaches were carried out in order to determine the diet, and to verify a possible diet diversification between the sexes, and times of the year. Males and females had a food diet consisting mostly of molluscs belonging the classes Scaphopoda, Bivalvia, Gast (mais) ropoda and crustaceans and fishes. Echinoderms, foraminifera, bryozoa, sponges, polychaete worms, coelenterates and brachiopods were also observed in smaller proportions. Both males and females had a carnivorous benthic diet. Growth and changes in the seasons were not reflected by changes in the diet.

Scientific Electronic Library Online (Portuguese)