Aportación al estudio de arcillas expansivas asociadas a las facies garumnienses de la Conca de Tremp (Prepirineo de Lleida)

Some clay levels of the garumnian facies, which surface in the southern sector of the Tremp Basin present a principal mineralogy of expansive type. The oedometer essays show that such materials present a very high grade of potencial expansivity. The swelling pressure presents values higher than 390 KN/m2. In the majority of the areas wherw this kind of clays surface the hydric erosion phenomena and the mass movements often appear to be very common and intense. The geomorphological role of the expansive clays is discussed as the triggering factor, associated to the development of these denudative processes

Geología del Montgrí

This paper, fundamentally stratigraphic, is based on the vertical distribution of fauna in sediments which constitute the Montgri Massif. The stratigraphic series is composed of two units: one allochtonous (Mesozoic) and a second one autochtonous (Paleogene). The latter crops out in front of the thrust belt and presents the typical facies described by PALLI (1972). The allochtonous part is formed by the following units (from bottom to top): variegated gypsiferous shales of Keuper age; marls, limestones and dolomites from the Lias (Domerian); gray breccia ted dolomites: supraliassic; and Cretaceous limestones with rare interbeds of calcareous marls and nodular shaly marls. In this unit the Neocomian, Barremian (?), Aptian, Albian, Cenomanian, Turonian (?) and Santonian haven been recognized. Structurally, the Montgri Massif is part of a thrust belt which has been divided into three parts of different development ang age. Both parts are affected by ample synclinal folds of NE-SW directions and fractures of NW-SE orientation. The fractures condition the torrential streams as well as the karstic phenomena present in the Massif. These and the eolian actions are the main causes of the present geomorphology of the Montgri

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

Sobre el Garumniense de Claret (Tremp-Lérida) y su 'contaminación' por el Ilerdiense.

El estudio de la serie marina del Ilerdiense del Oeste (le Tremp (Lérida), sobre todo en el corte de la Carretera de Tremp a Pont de Montañana, ha sido ya realizado y sus resultados publicados parcialmente (DE REKZI 1965 y en prensa)...

Notes per a la caracterització de la parla de la Conca de Tremp

Aquest article pretén contribuir a completar i actualitzar les dades disponibles sobre l'ús oral a la Conca de Tremp. Aquesta comunitat de parla de transició intradialectal entre l'àrea ribargorçanopallaresa i el lleidatà presenta característiques lingüístiques específiques que cal descriure per contribuir a conèixer el seu paper en el contínuum dialectal i per il·lustrar les tendències de l'ús oral actual.

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)

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 characterof the different levels and their faunal content, specially megafossils

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, similarsals que s'associen a altres manifestacions efusives neògenes de la comarca de l'Alt Empordà

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

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

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

Depósitos litorales y variaciones del nivel del mar durante el Holoceno en la Costa Brava (NE de Catalunya)

Se describe un conjunto de depósitos litorales localizados en la Costa Brava, que aparecen unos pocos metros por encima y por debajo del nivel del mar actual. En base a su génesis se han agrupado en niveles de conglomerados de pie de acantilado, playas levantabas sincementar y playas sumergidas cementadas (beachrock). Su edad se ha establecido apartir de los fragmentos de cerámica que contienen y de dataciones absolutas de 14C. Estos depósitos permiten detectaroscilaciones recientes del nivel del mar que se enmarcan en los últimos estadios de la transgresión Flandriense

Mid Holocene in Sant Julià de Boada (Baix Empordà, Girona): Stratigraphical sequence and paleoenvironmental records of the paludal deposits

Descripció de la seqüència estratigràfica i dels registres paleoambientals dels sediments holocens de Sant Julià de Boada