Fernández López, Sixto Rafael

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First Name
Sixto Rafael
Last Name
Fernández López
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Geológicas
Geodinámica, Estratigrafía y Paleontología
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Now showing 1 - 9 of 9
  • Publication
    Bathonian Working Group.
    (IUGS, 2003) Fernández López, Sixto Rafael
  • Publication
    Taphonomic alteration and evolutionary taphonomy
    (Palaeontological Network Foundation., 2006) Fernández López, Sixto Rafael
    Every process of taphonomic alteration implies change and modification of the affected taphonomic elements, but it does not necessarily lead to the destruction of taphonomic elements. Taphonomic alteration can be of four types: elementary, populational, taphonic and taphocladal. In order to interpret the differential preservation of fossils and fossilization mechanisms it is necessary to take in mind not only the original architecture of taphonomic elements and the environmental changes, but also the successive changes in architecture of taphonomic elements and the activities carried out by taphonomic elements, as well as the evolutionary modifications of taphons and taphoclades. This systemic and evolutionist procedure allows to explain how the representatives of some taphons or taphoclades have been able to end up being preserved outside of the limits of tolerance of the originally produced taphonomic elements.
  • Publication
    Bathonian Working Group
    ((International Subcommission on Jurassic Stratigraphy, 2006) Fernández López, Sixto Rafael
  • Publication
    Alteración tafonómica y tafonomía evolutiva
    (Real Sociedad Española de Historia Natural, 2005) Fernández López, Sixto Rafael
  • Publication
    Depositional sequences and ammonite fossilization on deep carbonate platform environments (upper Oxfordian, Iberian Range, Spain)
    (Institute of Geology Warsaw University, 2006) Fernández López, Sixto Rafael; Meléndez Hevia, Guillermo
  • Publication
    Ammonite succession at the Bajocian/Bathonian boundary in the Cabo Mondego region (Portugal)
    (Taylor & Francis, 2006) Fernández López, Sixto Rafael; Henriques, María Helena Paiva; Mangold, Charles
    The Cabo Mondego outcrops exposed along the cliffs, on the western margin of the Iberian Plate, show an expanded stratigraphic section of Lower Bathonian deposits containing abundant ammonoids. Upper Bajocian deposits correspond to similar facies, of muddy limestones alternating with marlstones, although ammonoids are scarce. A detailed succession of ammonites across the Bajocian/Bathonian boundary has been recognized at Cabo Mondego, which can form a useful bio- and chronostratigraphic standard for the Lusitanian Basin. The revision of previous collections from the classical section and new field samplings of two other separate sections allow the recognition through up to twenty metres of thickness, the highest zone of Bajocian (Parkinsoni Zone) and the lowest zone of Bathonian (Zigzag Zone). The Parkinsoni and the Zigzag zones established for NW European areas and belonging to the Northwest European Province, can be identified in the Lusitanian Basin, although the ammonite fossil assemblages are composed of Submediterranean taxa. However, a subdivision of the Parkinsoni Zone is not possible, due to the scarcity of well preserved ammonoids. The Zigzag Zone can be recognized and characterized as composed of two subunits (Parvum and Macrescens subzones) as represented in diverse European basins of the Submediterranean Province. Ammonite fossil assemblages of the Parvum Subzone may be grouped into two successive horizons, which are biochronostratigraphically equivalent to the subdivisions of the Convergens Subzone distinguished in the Digne-Barreˆme area (SE France). New biochronostratigraphic data on the Bigotitinae, youngest members of Leptosphinctinae and oldest members of Zigzagiceratinae are relevant in understanding the evolution and faunal turnover of the West Tethyan Perisphinctidae during earliest Bathonian. The ammonite succession at the Bajocian/Bathonian boundary in the Cabo Mondego region (Portugal) represents one of the most complete biostratigraphic records so far recognized on the Iberian Plate.IAmmonoids, biostratigraphy, chronostratigraphy, Iberia, Lusitanian Basin, Middle Jurassic, palaeobiogeography.
  • Publication
    Bathonian Working Group
    (2008) Fernández López, Sixto Rafael
  • Publication
    Bathonian Working Group
    (2006) Fernández López, Sixto Rafael