Fish ecology in Lake Banyoles (NE Spain): a tribute to Ramon Margalef / Josep Serra-Kiel, Emili Mató i Palós, Eloi Saula Briansó, [et al.]



En: Geologica acta. Vol. 1, Núm. 2 (2003) , p. 177-200

The stratigraphic basis of this work has allowed the use of larger foraminifers in the biostratigraphic characterisation of the new Shallow Benthic Zones (SBZ). This part of the volume presents a description of the sedimentary cycles formed by the transgressive-regressive systems of the Lutetian and Bartonian in the southeastern sector of the Ebro Foreland Basin.Concerning the Lutetian deposits studied in the Amer-Vic and Empordà areas, four sedimentary cycles have been characterised. The first and second are found within the Tavertet/Girona Limestone Formation (Reguant,1967;Pallí,1972), while the third and fourth cycles cover the Coll de Malla Marl Formation (Clavell et al.,1970), the Bracons Formation (Gich,1969,1972), the Banyoles Marl Formation (Almela and Ríos,1943),and the Bellmunt Formation (Gich,1969,1972). In the Bartonian deposits studied in the Igualada area,two transgressive-regressive sedimentary cycles have been characterised in the Collbàs Formation (Ferrer,1971),the Igualada Formation (Ferrer,1971),and the Tossa Formation (Ferrer,1971). The Shallow Benthic Zones (SBZs)recognised within the Lutetian are the following:SBZ 13, from the Early Lutetian, in the transgressive system of the first cycle;SBZ 14,from the Middle Lutetian, in the second cycle and the lower part of the transgressive system of the third cycle; SBZ 15,from the Middle Lutetian, in the remaining parts of the third system; SBZ 16, from the Late Lutetian,throughout the fourth cycle.The association of larger foraminifers in the first and second cycles of the Bartonian in the Igualada area has been used as the basis for the definition of SBZs 17 and 18 recognised in the Bartonian of the western Tethys.

Marine and transitional Middle/Upper Eocenen units of the Southeastern Pyrenean Foreland Basin (NE Spain) / Josep Serra-Kiel, Anna Travé i Herrero, E. Mató, [et al.]



En: Geologica Acta. vol. 1, núm. 2 (2003) , p. 177-200

The stratigraphic basis of this work has allowed the use of larger foraminifers in the biostratigraphic characterisation of the new Shallow Benthic Zones (SBZ). This part of the volume presents a description of the sedimentary cycles formed by the transgressive-regressive systems of the Lutetian and Bartonian in the southeastern sector of the Ebro Foreland Basin. Concerning the Lutetian deposits studied in the Amer-Vic and Empordà areas, four sedimentary cycles have been characterised. The first and second are found within the Tavertet/Girona Limestone Formation (Reguant, 1967; Pallí, 1972), while the third and fourth cycles cover the Coll de Malla Marl Formation (Clavell et al., 1970), the Bracons Formation (Gich, 1969, 1972), the Banyoles Marl Formation (Almela and Ríos, 1943), and the Bellmunt Formation (Gich, 1969, 1972). In the Bartonian deposits studied in the Igualada area, two transgressive-regressive sedimentary cycles have been characterised in the Collbàs Formation (Ferrer, 1971), the Igualada Formation (Ferrer, 1971), and the Tossa Formation (Ferrer, 1971). The Shallow Benthic Zones (SBZs) recognised within the Lutetian are the following: SBZ 13, from the Early Lutetian, in the transgressive system of the first cycle; SBZ 14, from the Middle Lutetian, in the second cycle and the lower part of the transgressive system of the third cycle; SBZ 15, from the Middle Lutetian, in the remaining parts of the third system; SBZ 16, from the Late Lutetian, throughout the fourth cycle. The association of larger foraminifers in the first and second cycles of the Bartonian in the Igualada area has been used as the basis for the definition of SBZs 17 and 18 recognised in the Bartonian of the western Tethys.

Morfologia del basament del Pirineu oriental: evolució i relació amb els mantells de corriment / Eduard Clavell i Vergés, A. Martínez, Jaume Vergés i Masip
Clavell i Vergés, Eduard


En: Acta Geologica Hispanica. vol. 23, num. 2 (1988) , p. 129-140

El mapa d'isobates de la base del Paleogen autocton del Pirineu oriental mostra la topografia subterrania actual del basament. Aquesta topografia presenta una gran zona de culminació a la transversal de Banyoles. Les linies d'isoprofunditats descriuen una forma cóncava vista des del S, essent les maximes profunditats cap al NW amb mes de 4.000 m i en menor importancia cap al NE. Aquestes zones de maxima profunditat coincideixen, en superfície, amb els Mantells superiors: els del Pedraforca al NW i els de L'Emporda al NE constitui'ts principalment per series mesozoiques. En el sector occidental, les línies d'isobates de la base de l'Eoce tenen gran continuitat per sota Je I'anomenada alineació del Segre. A l'est de la zona estudiada hi ha un conjunt de falles amb enfonsament del bloc oriental amb una edat mes moderna a mida que ens desplacem a I'est i lligades a la formació de la depressió de l'Emporda: Els Mantells superiors es poden dividir en dos grans grups segons la seva serie cretacica: els mantells superiors del Pedraforca i de 1'Emporda constituits per Cretaci inferior i base del Cretaci superior i els mantells inferiors del Pedraforca i de l'Emporda constituïts per Cretaci superior a partir del Santonià.