Factors influencing recent benthic foraminifera distribution on the Guadiana shelf (Southwestern Iberia)

Mendes, Isabel; González, Ramón; Dias, João Alveirinho; Lobo, F. J.; Martins, V.

doi:10.1016/j.marmicro.2003.11.001

Cited by 163 publications

(107 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…With 35 taxa so far described, the genus Ammonia exhibits a significant range of morphological variants, making species-level identification particularly difficult morphologically (Holzmann et al, 1998;Langer and Leppig, 2000;Hayward et al, 2004). A variety of specific epithets for Ammonia morphotypes are in current use along the Guadiana Estuary and adjacent shelf (see Ruiz et al, 1996Ruiz et al, , 2005Boski et al, 2002Boski et al, , 2008Mendes et al, 2004Mendes et al, , 2012Delgado et al, 2012). Aiming to better understand Ammonia genetic affinities and clarify some of these taxonomic problems, we subjected three morphological variants to genetic analysis.…”

Section: Classification and Genetic Analysismentioning

confidence: 99%

“…The direct comparison of our specimens with the specimens of Mendes (2010) led us to conclude that both belong to the same species and thus Mendes' (2010) identification criteria were adopted. Bolivina ordinaria distribution within the Guadiana Estuary was surprising, as it is primarily described as an abundant species at great depths on the Portuguese continental shelf (Mendes et al, 2004;Martins et al, 2006Martins et al, , 2007Mendes, 2010). Mendes (2010) considered B. ordinaria as a ubiquitous, very abundant species, highly adaptable and tolerant to a wide range of different factors or combination of factors, living at two different continental-shelf depth ranges (25-100 m in the southeast and 20-60 m in the northwest Gulf of Cadiz), and strongly associated with the direct influence of river discharges.…”

Section: Middle Estuarymentioning

confidence: 99%

See 1 more Smart Citation

Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)

Camacho

Moura

Connor

et al. 2015

Palaeontologia Electronica

View full text Add to dashboard Cite

Section: Classification and Genetic Analysismentioning

confidence: 99%

Section: Middle Estuarymentioning

confidence: 99%

Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)

Camacho

Moura

Connor

et al. 2015

Palaeontologia Electronica

View full text Add to dashboard Cite

“…Scarcity of infaunal benthic foraminifera typically related with upwelling areas, such as Bolivina spathulata (Mendes et al, 2004;Diz et al, 2006;Diz and Frances, 2008), disagrees with a nutrient-rich setting.…”

Section: Origin Of the El Alcor Carbonatesmentioning

confidence: 99%

An enigmatic kilometer-scale concentration of small mytilids (Late Miocene, Guadalquivir Basin, S Spain)

Aguirre

Braga

Martín

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

View full text Add to dashboard Cite

Upper Miocene heterozoan carbonates crop out extensively in a NE-SW-trending belt (42 km long and 1.5-8 km wide) along the so-called El Alcor topographic high, from Carmona to Dos Hermanas (Seville, S Spain). These carbonates formed at the southern active margin of the Guadalquivir Basin, the foreland basin of the Betic Cordillera.They change to marls basinward (NE) and to sands landward (SE and SW). Therefore, carbonate production was constrained to a limited area in an otherwise siliciclastic shelf.The carbonates (up to 40 m thick) overlie a gradually coarsening-upward succession of marls followed by silts and sandstones. The carbonate sequence can be divided into three subunits corresponding, from bottom to top, to lowstand, transgressive, and highstands system tracts deposits. The lower subunit, exhibiting extensive trough crossbedding, is interpreted as a shallow-water bar deposit. The intermediate subunit onlaps underlying sediments and was deposited in deeper, low-turbulence conditions. The upper subunit deposits accumulated in a well-oxygenated outer platform based on benthic foraminiferal assemblages. The presence of hummocky and swaley crossstratification in these latter deposits suggests that they were affected by storms.Pervasive fluid-escape structures are also observed throughout the carbonates.The three subunits consist of bioclastic packstones to rudstones made up of abundant fragments of small mytilids. Isotopic data from serpulid polychaete Ditrupa tubes show 13 C-depleted values (up to -16.1‰), whereas  18 O yields normal marine values. Additional isotopic data on shells of scallops, oysters, and small mussels, as well as bulk sediment, show diagenetic alterations. Based on actualistic examples of massive concentrations of mussels, the nearly monospecific composition of the El Alcor deposits, together with negative  13 C values of Ditrupa tubes, indicates that cold seeps A C C E P T E D M A N U S C R I P T

show abstract

“…Glauconite is well-known to be as so ci ated with pe ri ods of trans gres sion and low de po si tion or even erosion of sed i ment (e.g., Rech-Frollo, 1963;McRae, 1972;Van Houten and Puruker, 1984;Har ris and Whit ing, 2000;Gon za lez et al, 2004). Cattaneo and Steel (2003) as so ci ated the max imum flood ing sur face (MFS) with con densed sec tions show ing re duced ox y gen val ues, high or ganic mat ter con tent, authigenic ma te rial (e.g., glauconite), abun dant and di verse plank ton, and low amounts of ben thic foraminifera.…”

Section: Sedimentologymentioning

confidence: 99%

“…7U), Asterigerinata planorbis, spe cies of Elphidium (Fig. 7S) and miliolids (Parker, 1948;Bradshaw, 1957Bradshaw, , 1961Bandy and Arnal, 1960;Haake, 1977;Scott et al, 1980;Poag, 1981;Albani and Serandrei Barbero, 1982;Jorissen, 1987;Walton and Sloan, 1990;Murray, 1991;Almogi-Labin et al, 1992, 1995Pawlowski et al, 1995;Debenay et al, 1998;Alve and Murray, 1999;Buck et al, 1999;Debenay and Guillou, 2002;Hay ward et al, 2004;Mendes et al, 2004;Spezzaferri et al, 2004;PippÀr and Reichenbacher, 2010). The in crease in shal low-wa ter taxa and abrupt de crease in Uvigerina spe cies (which is rarely <100 m - Rögl and Spezzaferri, 2003) com pared to the sam ples be low sug gest a shift to ox y gen ated, low pri mary pro duc tiv ity mid dle-neritic (50-100 m) en vi ron ments.…”

Section: Foraminiferal Assemblagesmentioning

confidence: 99%

Palaeoenvironmental changes in the Transylvanian Basin during the Early Miocene revealed by the foraminifera assemblages

Székely

Beldean

Bindiu

et al. 2015

View full text Add to dashboard Cite

. Palaeoenvironmental changes in the Transylvanian Ba sin dur ing the Early Mio cene re vealed by the foraminifera as sem blages. Geo log i cal Quar terly, 60 (1): 167-180, doi: 10.7306/gq.1245The evo lu tion of the Transylvanian Ba sin dur ing the Early Mio cene has been re con structed from the suc ces sion of palaeoenvironments in ferred from sedimentological trends and the suc ces sion of spe cific foraminiferal as sem blages from Lower Mio cene Tihãu sec tion in the north west ern Transylvanian Ba sin. Plank tonic foraminifera sug gest a Burdigalian age and re cord sea level changes, cli ma tic and pro duc tiv ity events. Ben thic foraminifera of fer data on the palaeoenvironmental evo lu tion, with a large-scale progradational (coars en ing up) sed i men tary suc ces sion in flu enced by re gional tec ton ics. The suc ces sion of depositional events in cludes: (1) transgressive coarse grained de pos its with typ i cal Med i ter ra nean as semblages of bi valves in beach en vi ron ments; (2) a glauconitic fa cies which can be as so ci ated with the max i mum flood ing surface of the trans gres sion; (3) sed i men ta tion con tin ued on a nar row shelf in flu enced by del tas dur ing the highstand; (4) the in flu ence of re gional tec ton ics and sub se quent fill ing with turbidites as so ci ated with fan del tas.

show abstract

Factors influencing recent benthic foraminifera distribution on the Guadiana shelf (Southwestern Iberia)

Cited by 163 publications

References 22 publications

Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)

Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal)

An enigmatic kilometer-scale concentration of small mytilids (Late Miocene, Guadalquivir Basin, S Spain)

Palaeoenvironmental changes in the Transylvanian Basin during the Early Miocene revealed by the foraminifera assemblages

Contact Info

Product

Resources

About