Avaluació dels recursos d'àrids disponibles en medis fluvials mitjançant tècniques geofisiques. Aplicació a la cubeta de Celrà (Riu Ter, Ne Catalunya)

The depth of the water table and the clay content are determinant factors for the exploitability of natural aggregates, such as the alluvial sands and gravels found on the fluvial domain of the Ter River. In this preliminary study, carried out in the Celri basin, we conclude that these variables can be determined by means of geophysical methods and recornmends the use of such methods in studies of regional character

Morfolitología de las terrazas del Ter en Girona

It is a contribution to the study of the terraces of the river Ter along its mid-course in the town of Girona, since that is the last speace where it is still possible to observe four of these terraces with clear characteristics of climatical deposition. Itsmorphological peculiarities are described as well as the morphometrical and lithological parameters of its pebbles. These terraces are compared with others which have been studied in other areas of the regions and conclusions are drawn concerning deposition, source àrea and chronology

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

Las fuentes naturales del término municipal de Sant Feliu de Guíxols (Girona)

The behaviour of 21 natural springs in a granític massif is studied in this survey. Geomorphological features of the zone are described as well as water circulation and rising 25 parametres of each of them are analysed ans conclusions are withdrawn regarding geological conditions of rising, course, chemism and potability

Participació de les aigües subterrànies en la gènesi d'ambients palustres continentals: el cas dels prats de Sant Sebastià (Caldes de Malavella, Girona)

The area known as 'prats de Sant Sebastià' is in Caldes de Malavella. It is part of the wetlands located in the south-eastern end of the Selva Basin. Several areas with unusually high conductivity (EC up to 24,500 uS/cm) have been identified in this place. This fact allows highly specialised and comparatively rare botanical species to grow in this area. These saline soils follow a north-south line-up. The geophysical data, obtained with a field conductivemeter (EM 31), show that this superficial line-up continues in the subsoil. In addition to this, the conductivity cartography, made for an electromagnetic exploration depth of 6 meters, shows that the width of the region where these salinity anomalies take place increases in depth. When included in the hidrogeological context of this sector of the Selva Basin, these data bring new elements for the study of the genesis and working of these marshy environments.The model that future research will have to confirm, maintains that the groundwater discharges coming from the underlying hydrogeothermal aquifer are a conditioning factor of the aforementioned phenomenon. This ascending flow of highly mineralised waters (TDS of about 3,500 mg/l) can produce and keep stable the soil salinity

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 ofcambro-ordovician age. The upper one is composed by volcanic rocks, carbonate schistsand 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

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-cementedemerged 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

Contribución al estudio morfolitológico del sector costero central del macizo de Begur (Girona)

This paper makes a contribution to the knowledge of the coastal fringe morphology of the ‘Macizo de Begur’. A lithological study, macro and microscopic, has been carried out of a variety of a series of metamorphic, plutonic, phyllonianic and effusive rocks

Un edifici volcànic inèdit a Caldes de Malavella (la Selva, Girona): el volcà del camp dels Ninots

Es descriu la morfologia i els dipòsits del volcà inèdit del camp dels Ninots (Caldes de Malavella)

Aplicación a la prospección geofísica electromagnética en la delimitación espacial de los depósitos travertínicos de la depresión de Banyoles (Girona)

Es presenten els resultats d'una campanya de prospecció geofísica electromagnètica amb l'objectiu de poder delimitar espaialment les formacions travertíniques quaternàries de la vall de Banyoles

Modelo deposicional de las formaciones travertínicas de la depresión de Banyoles (Girona)

Estudi de les formacions travertíniques que es troben al Pla de Banyoles

Dos nous afloraments volcànics a l'Alt Empordà (Girona)

Two unknown volcanic outcrops in the Alt Emporda (Girona) are described in this paper . We present their exact situation and a description of their occurrence and their mineralogical and petrological characteristics. Bothhave been classified as alkali-olivine basalts and they probably extruded during the Neogen period

La Crosa de Sant Dalmai: un ejemplo de Patrimonio Geológico de Girona

The main volcanic edifice of the Crosa de Sant Dalmai is the largest in the catalonian volcanic area. The crater is 1.300 m long and 74 m deep. At present it is protected by the "Pla d'Espais d'Interès Natural" of the Generalitat de Catalunya

Restoration of a lost geological reference point: the loggingstone of Pedralta (Girona, Spain)

The Pedralta is a loggingstone formed of monzonitic leucogranites, which has a volume of about 38 m3 and weighs 101 tons. After its fall in December 1996, a public subscription was opened to meet the expenses of the restoration work, which was completed in May 1999