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Fernández López, Sixto Rafael ; Henriques, María Helena Paiva ; Linares Rodríguez, Asunción | Kluwer | 1996From different areas of the Iberian Peninsula more than 600 specimens of Aalenian Tmetoceras have been found. This taxonomic group represents less than 20% of the whole ammonoids recorded in Opalinum, Murchisonae, Bradfordensis and Concavum bioz[...]texto impreso
Fernández López, Sixto Rafael ; Henriques, María Helena Paiva ; Linares Rodríguez, Asunción ; Sandoval Gabarrón, José ; Ureta Gil, María Soledad | Kluwer | 1999Several hundred Aalenian Tmetoceras from the Iberian Peninsula (N Lusitanian Basin, Asturias, Basque-Cantabrian Basin, NE Cameros, NW Iberian Basin, Aragonese Platform, Tortosa Platform, Castilian Platform, Majorca and Betic Basin) have been rev[...]texto impreso
Some abrasion surfaces displayed by internal moulds of ammonites, such as annular abrasion furrows formed on the venter surface and ellipsoidal abrasion facets preferentially developed on the last third part of the preserved whorl, are diagnosti[...]texto impreso
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Fernández López, Sixto Rafael ; Henriques, María Helena Paiva ; Mangold, Charles | Taylor & Francis | 2006The 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 facie[...]texto impreso
Variations of preservational features of the successive recorded associations of ammonites in carbonate epicontinental platforms enable distinction of taphonomic cycles induced by relative sea-level changes. A taphocycle comprises two or more su[...]texto impreso
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Ammonites, ciclos tafonómicos y ciclos estratigráficos en plataformas epicontinentales carbonáticas.
Fernández López, Sixto Rafael | Museo Nacional de Ciencias Naturales: Sociedad Española de Paleontología | 1997Algunas variaciones de los caracteres tafonómicos y la distribución de las asociaciones registradas de ammonites en las plataformas epicontinentales carbonáticas permiten distinguir secuencias tafonómicas elementales, tafosecuencias, taforregist[...]texto impreso
Fernández López, Sixto Rafael | Museo Nacional de Ciencias Naturales: Sociedad Española de Paleontología | 1997El estado de conservación y la distribución de las asociaciones registradas de ammonites permiten interpretar los ambientes sedimentarios de las plataformas epicontinentales mesozoicas. Sin embargo, la abundancia o la concentración de conchas de[...]texto impreso
Fernández López, Sixto Rafael ; Duarte, Luís Vitor ; Henriques, María Helena Paiva | Sociedad Geológica de España | 2000Preservational features of ammonites recorded in the Lower Pliensbachian lumpy limestones of the Lusitanian Basin confirm the deep marine origin previously established for this facies. These deposits can be subdivided into three main taphofacies[...]texto impreso
Fernández López, Sixto Rafael | Universidad Complutense de Madrid. Departamento de Estratigrafía | 1997Some variations of the taphonomic features and the distribution of the successive recorded associations of ammonites in the carbonate epicontinental platforms enable to distinguish elementary taphonomic sequences, taphosequences, taphorecords, t[...]texto impreso
Pavia, Giulio ; Fernández López, Sixto Rafael ; Mangold, Charles | Università degli studi di Milano. Dipartimento di Scienze della Terra "A. Desio" | 2008The uppermost Bajocian to lowermost Bathonian ammonoid succession has been studied in the Bas Auran area in view of choosing one of its sections as the Global Stratotype Section and Point (G.S.S.P.) of the Bathonian Stage. The Bas Auran ammonite[...]texto impreso
Bas Auran, in south-eastern France, is the candidate area for Global Boundary Stratotype Section and Point (GSSP) of the base of the Bathonian Stage (Middle Jurassic). In the Bas Auran area, upper Bajocian and lower Bathonian deposits are made u[...]
