Presencia del paleogeno bajo los sedimentos neogénicos de Vilablareix (Girona)

This study makes clear the existence of a paleogenical red basal level (Pontils Fm.) in the Vilablareix àrea, under the mio-pliocenical cover of the Girona plain, enlargening the surface known go far of that level

Aportacions al coneixement del vulcanisme neogen de l'Alt Empordà: tres afloraments volcànics inèdits al terme municipal de Roses

En aquest treball es descriuen les característiques litològiques principals de tres afloraments volcànics inèdits que han estat localitzats al terme municipal de Roses. Es tracta de materials basàltics, similars als que s'associen a altres manifestacions efusives neògenes de la comarca de l'Alt Empordà

Algunes precisions sobre l’estratigrafia de la Cova de l’Arbreda (Serinyà, Girona)

Estudi de l’estratigrafia de la Cova de l’Arbreda, situada a Serinyà, a la comarca del Pla de l’Estany (Girona). Se centre en el reompliment que hi va haver al llarg del Paleolític Superior, en què s’observa un canvi a cop d’ull què, situat sobre els nivells solutrians, s’havia atribuït al pas vers el postglacial

Aportaciones al conocimiento de la geología de Bac Grillera (prepirineo, Girona)

The Bac Grillera nappe (Prepirenean of Girona) shows a stratigraphic section composed of two unconformi ty-bounded units. The lower unit is composed by rethian (marly limestones) and liassic (brechoid marly limestones and limestones). The upper unit (sandstones and marly limestones) belongs to the upper Cretaceous (Campanian)

Sedimentología del Mioceno del Vallés occidental (prov. de Barcelona)

In this paper we make a litostratigraphical study on the Miocene of the 'Vallés occidental' (Barcelona, Spain) which embraces a part of the 'Depresion Media' of the intermediary tectonic grave between the 'Cadena Litoral' and 'Prelitoral' of the 'Sistema Mediterráneo'. At the same time we undertake an analysis of the bassin

Aportaciones al conocimiento del Cretácico del macizo del Montgrí (Girona)

ln this paper we describe a stratigraphic column of the Cretaceous of the Montgrí. This description is based on several partial stratigraphic cross sections as well as on the lithological character of the different levels and their faunal content, specially megafossils

Interpretación sedimentológica y paleogeográfica del nivel de areniscas eocénicas de Sarrià de Ter (Prov. de Gerona)

There is in this work a description of sedimentological characters of the medium Eocene sandstone level from Sarriá de Ter (Gerona province Spain) and an interpretation of their genesis and situation in the regional paleogeography. The conclusion is that these sandstones form a deltaic channel(delta front). To wards the E and NE the become fluvial deposits, to wards the W, Plana de Vic, they become clay and silstones considered as a prodelta

Serie estratigráfica de Liásico de la provincia de Girona

From several small stratigraphic sections, we have reconstituted the Liassic interval of the Girona Province (NE Spain). We have been able to identify paleontologically the Carixian (Jamesoni, Ibex, and perhaps, Davoei zones), the Lower Domerian (Stockesi zone), and the Middle Toarcian (possibily Variabilis zone, as well as Thouarsense and Insigne zones). The Lower Toarcian (Serpentinus zone) is represented by fossil remains no ‘in situ’. The lowest Toarcián (Tenuicos-tatum zone) as well as the Middle and Upper Domerian (Margaritatus and Spinatum zones respectively, are probably represented by stratigraphic gaps

Significado sedimentológico de los niveles con Assilinas de la Formación Armancies (Eoceno medio) y sus equivalentes laterales

In this paper we show some sedimentological characteristics of Assilina beds from Armancies Fm. (middle Eocene) and their lateral equivalents that let us to remark some aspects of their genesis. We arrive to the conclusion that, in occidental sector (Bagá-Campdevanol), ‘las barras de Assilinas’ from the Armancies Fm. are grain flow channels, first sedimented at W of Terrades and after slided, from E to W in a turbidite basin, without any coarse clastic

Métodos de reconocimiento del subsuelo

The aim of this workshop is to present the main methods of subsoil studies (namely mechanical and geophysical methods) to the Earth Sciences professorate. These methods frequently involve the use of specific material. The different methods are usually taught in the classroom where there is no real contact between the students and the equipment. Several activities, all of them taking place in surrounding areas of the university campus of Girona, will provide the assistants to the workshop with the opportunity of making measurements with different equipment. These activities will be made in the field so as to contribute to the resolution of a problem which will have been previously proposed. The problems presented are situations, most of them real, when subsoil investigation techniques are usually used. These cases have been employed as teaching-learning strategies with university and second grade students in the area of Girona. Finally, some examples of exercises involving the treatment of data obtained through subsoil investigation techniques are also presented to complement the workshop

El Holoceno medio palustre de la llanura litoral del río Ter (Baix Empordá, Girona)

The paludal deposits presented here belong to a geomorphological unit identified between Palafrugell Corridor and the littoral plains of Ter River (Baix Ter), associated to a carbonate-rich spring system. The sections show a distintic clay level, mixed with black silts, very rich in snail remains. The malacological assemblage contained stillwaters species (Bithynia leachii, Galba truncatula, Pisidium milium, Radix peregra) along with damp species (Monacha cartusiana, Oxyloma elegans, Succinea putris, Succinella oblonga, Vallonia pulchella, Vertigo sp.). Some open-dry species are also present (Cernuella virgata, Eobania vermiculata, Pomatias elegans, Rumina decollata) revailing a mosaic-like landscape. Radiocarbon dates place this level ca. 7.000BPwithin the Holocene sequence of the Baix Ter basin. Colluvial deposits on top of these paludal levels have a typical open-dry malacological assemblage (Cernuella virgata, Cochlicella acuta, Eobania vermiculata, Pomatias elegans, Rumina decollata, Trochoidea elegans) the same assemblage that inhabits the Empordà littoral plains nowadays

El paleozoic del massís de Begur (Girona)

The Paleozoic materials of Massís de Begur are described from a stratigraphical point of view. We distinguish two units: the lower one, present phillites with carbonate layers of cambro-ordovician age. The upper one is composed by volcanic rocks, carbonate schists and black slates, bring from caradocian and ashgillian age

El paleogen del massís de Begur (Girona)

Stratigraphic series concerning the paleogenic materials of the 'Massis de Begur' are described. We note the presence of some diferences between its northem and westem margins

Investigación geofísica de los paleovalles pleistocenos del NE de Cataluña: el ejemplo de la Riera de Tossa (Costa Brava meridional)

The geometry of Riera de Tossa (Costa Brava, Catalonia) Pleistocene paleovalley has been studied by two geophysical prospecting methods: vertical electric sounding (VES-DC) and seismic refraction. The results show the existence of a sudden slope change of the thalweg that permits to differentiate two sections where erosion processes operated in unequal intensity. Based on geological and geomorphological available data, it can be inferred that this slope rupture is caused by the litological control imposed by the alineation of resistant materials, which limited the headward erosion extend of the creek during the Upper Pleistocene

Oscil.lacions del nivell del mar i sediments associats durant l'Holocè a la Costa Brava Meridional (Girona)

Several marine deposits in the southern Costa Brava shoreline have been studied. They appear at different heights above and below the present sea level. Three groups are defined in relation to their origin: conglomerate levels at the bottom of the cliffs, not-cemented emerged beaches and cemented submerged beaches. The age of the emerged beaches has been accurately determined by means of the ceramic content and radiocarbon dating. Chronological succession of the deposits and their stratigraphic and paleontological characteristics allow to define a sequence of the sea level changes during the latest stages of the versiliane transgression in the studied area