180 research outputs found

    Pliensbachian–Toarcian ostracod biogeography in NW Europe: Evidence for water mass structure evolution

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    This paper examines the role played by palaeoceanographic and climatic conditions on the palaeobiogeography of the Pliensbachian–Toarcian ostracods (Early Jurassic) in the European Epicontinental Sea (EES). The influence of the palaeogeography, ocean currents and sea level, temperature and salinity variations on ostracod abundance, diversity and migration patterns is reconstructed. Ostracod migration follows an anticlockwise circulation in the eastern side of the EES, with a leading northeast–southwest movement, and the frequent arrival of Tethyan faunas into the central and western parts of the EES during the Pliensbachian. A three-fold classification of water masses based on salinity, temperature, lithological and fossil data is proposed. The repeated inflow of Tethyan ostracods into the EES ended by the earliest Toarcian. This ostracod event is related to the opening of the Hispanic Corridor and to the reorganization of the surface and deep circulations that may have generated a cold episode at the beginning of the Toarcian

    Palaeoceanography and biogeography in the Early Jurassic Panthalassa and Tethys Oceans

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    A first conceptual palaeoceanographic model for the Early Jurassic Panthalassa and Tethys Oceans is outlined in the present paper. The new palaeoceanographic model uses fundamental physic–oceanographic principles known from the modern world and a global palaeogeographic reconstruction for the Early Jurassic to examine the long-term response of the Panthalassic and Tethyan fossil invertebrate faunas to the proposed surface ocean circulation. Analysis of palaeobiogeographical data (ostracods, ammonites, brachiopods and bivalves) has enabled circulation changes to be reconstructed over the studied period in some detail. Panthalassic circulation pattern shows an almost hemispherical symmetric pattern, with the development of the two large subtropical gyres that rotates clockwise in the northern hemisphere and anti-clockwise in the southern hemisphere. Surface circulation in the Tethyan Ocean is dominated by monsoonal westerly-directed equatorial surface currents that reached its western corner and droved them off to the north, along the northern side of the Tethys Ocean, during summer and in opposite direction during the winter

    Ostracods from the global stratotype section for de base of the Aalenian stage, Jurassic, at Fuentelsaz section (Cordillera Ibérica, Spain)

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    The Toarcian/Aalenian Global Stratotype Section and Point (GSSP) have been recently placed in the Fuentelsaz section, northeastern Spain. This paper is part of a long-term project that attempts to describe for the first time the fossil ostracod assemblages present in the Toarcian-Aalenian boundary GSSP, and to assess their palaeobiogeographical significance. The study of the Late Toarcian-Early Aalenian Turmiel and Casinos formations at the Fuentelsaz section has produced a detailed stratigraphy and a large collection of stratigraphically constrained ostracod faunas. Twenty benthic ostracod species have been identified and for the first time described in Spain. Higher part of the Mactra Subzone, Late Toarcian, have yielded abundant ostracod faunas, including mostly species of the genera Praeschuleridea, Cytherelloidea and Kinkelinella; fossiliferous marls of the Late Toarcian and part of the Early Aalenian and poorly fossiliferous marls at the beginning of the Opalinum Zone are dominated by Praeschuleridea and Cytherelloidea. The boundary between the Toarcian and Aalenian is not characterized by any radical change in the ostracod faunal composition. The Fuentelsaz sequence exhibits ostracod assemblages comparable to those recorded in western Europe, with many of their species having similar stratigraphical distributions

    Caracterización secuencial y bioestratigráfica del Aptiense-Albiense p. p. en la Sierra de Sopalmo, Prebético Interno (Prov. de Murcia).

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    Se analizan las unidades litoestratigráficas y las principales facies de los materiales correspondientes al Aptiense-Albiense p.p. en la Sierra de La Solana del Sopalmo (Jumilla, Murcia). así como su contenido fosilífero, fundamentalmente foraminíferos bentónicos y rudistas, con el que se determina su edad. Se reconocen cinco secuencias principales, caracterizando en cada una de ellas tanto su evolución vertical como las variaciones específicas de las mesosecuencias que las componen. Al mismo tiempo, se relacionan con las secuencias de depósito establecidas a escala regional. Finalmente, se destaca la importante tasa de sedimentación que presenta este afloramiento durante todo el Cretácico Inferior, lo que le hace comparable con el de la Sierra del Carche, mientras que, por el contrario, no existe una continuidad paleogeográfica con el de Sierra Larga

    Conhecimentos sobre aleitamento e a relação com a sua prevalência

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    Objective: Determine the level of knowledge about maternal breastfeeding and analyze to what extent this influences the intention to breastfeed after the introduction of infant feeding at the 6th and 16th weeks and at 6 months postpartum. Method: Prospective descriptive study conducted with pregnant women in Galicia (Spain). By means of a self-filling questionnaire, data were collected on the intention of the woman to feed the newborn and their knowledge about breastfeeding. Pregnant women were also contacted at the 6th and 16th weeks and at 6 months postpartum to know the type of feeding they gave their child. Results: 297 pregnant women participated in the study, of which 90.4% wanted to exclusively breastfeed their baby, however, only 28.2% continued up to 6 months. The level of knowledge about breastfeeding was regular and it was observed that it influences both the intention and the type of feeding of the newborn, thus it is an element to be considered when developing educational strategies aimed at increasing breastfeeding rates. Conclusion: The level of pregnant women’s knowledge about breastfeeding is regular and influences the choice of how to feed their babies and the duration of exclusive breastfeeding. Strategies should be implemented to increase knowledge and improve breastfeeding rates

    Clinicopathological characteristics of infiltrating lobular breast carcinoma in elderly women: Preliminary results

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    This study was conducted to investigate the clinicopathological parameters in elderly women (aged >70 years) with infiltrating lobular carcinoma (ILC) of the breast and compare the results with those obtained from younger patients (aged 55-70 years). The study sample included a total of 46 women with ILCs, 10 aged >70 and 36 aged 55-70 years. The parameters analysed were tumor size, histological grade (HG), axillary lymph node involvement, distant metastasis and immunohistochemical expression of estrogen, progesterone and androgen receptors, Ki67, p53 and B cell lymphoma 2. Compared to women aged 55-70 years, ILCs in women aged >70 years were commonly of larger size (P=0.068) and were more frequently HG3 (P=0.024). There were no statistically significant differences in the other parameters analysed. Furthermore, we were unable to determine differences in cancer recurrence and mortality in the two patient subgroups during our follow-up. In conclusion, our preliminary results, based on the limited number of cases included in this study, indicate that i) ILCs in women aged >70 years tended to be larger compared to those in women aged 55-70 years and were more frequently of grade 3; and ii) there were no significant differences in terms of recurrence and mortality between the two patient subgroups during our follow-up

    CA15.3 Serum Concentrations in Older Women with Infiltrating Ductal Carcinomas of the Breast

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    Breast cancer is currently becoming a disease of the elderly. We have studied the relation between CA 15.3 serum concentrations and clinical-pathological parameters in 69 women with IDC aged over 70 years (76.3 ± 4.2; range: 71–88; median 76). A group of 205 women with the same tumor but aged <70 years (62.8 ± 4.0; range: 55–70; median 63) was also considered for comparison. Tumor size, axillary lymph node involvement, distant metastasis and histological grade were taken account. Serum CA 15.3 was determined by luminescence assay. CA 15.3 serum concentrations ranged between 6 and 85 U/mL (median 22.9 U/mL), and were higher only in patients with greater (qualitative and quantitative; p: 0.041) tumor size. Our results show that in women with IDCs, and aged over 70 years, serum CA 15.3 serum concentrations are associated exclusively with a greater tumor size, being these findings different to those described in women with the same subtype of tumor considered as a whole or with lower age.This work was supported by grant PI11/01806 from ISCIII (Spain)S

    Sistema de Información de los Puntos Turísticos de Andalucía (SIPTA)

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    Calidad, innovación y prospectiva turística de la consejería de turismo, comercio y deporte SE-111/0

    PBL aplicado a los estudios de Historia del Arte. Elaboración de materiales didácticos para el Grado en Historia del Arte

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    El Aprendizaje Basado en Proyectos (PBL) es una metodología alternativa y/o complementaria a las nuevas enseñanzas utilizada en muchas universidades del mundo. En el proyecto se ha llevado a cabo, además de un empleo del sistema en las clases, la elaboración de materiales didácticos
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