6 research outputs found
Facies model, cementation and sedimentary evolution of a 20th-century beach and beachrock: The Gorrondatxe wave and tidal coastal system (NE Spain)
Lithology, bedding, and sedimentary structures of the Gorrondatxe coastal and beach system show an upper shoreface around the low-water level and containing the coarsest grain sizes; a foreshore in the main intertidal zone, which is mainly composed of sands with minor gravels and a distinctive low-angle, seaward-dipping, planar-parallel lamination; and a backshore zone with a mixture of marine-derived sands (washover) and nonmarine sands and muds (aeolian, subaerial ponds) above the high-tide water level. The facies model shows a wave-dominated, mesotidal, composite beach with a fining-upwards and aggradational trend. Over the 20th century, a beachrock developed in this area as a result of heavy-industry waste dumping (steel industry) off the coast, which later became attached to the coast. There are a variety of cements and degrees of lithification in the beachrock, suggesting that the beachrock-related processes, although coetaneous, were not similar in all these zones and that different cements developed at the same time. Sand cementation can be used to recognize such facies in the stratigraphic record or in well cores, when other kinds of data are not available. The upper shoreface sandstones are hard andwell-cemented, with awhitish circumgranular aragonite cement and good intergranular porosity; the foreshore sands are medium-hard, with a brown, irregular, aragonite needle cement, which shows higher intergranular porosity; finally, the backshore sands are only lightly cemented,with a brown aragonite and rhombohedral calcite cement, with the highest intergranular porosity. SEM images show the presence of Coccus-type bacteria in all the different facies and zones; these are the best proof of metabolic activity, probably of ureolytic bacteria, in the origin of all these cements.Over the course of the 20th century,Gorrondatxe evolved from a formerly dissipative, ridge and runnel beach to an active, aggrading and prograding, reflective beach, and finally to an inactive beach prone to erosion. The change to a reflective profile and the cementation of the beachrock indicate that anthropic offshore inputs were rapidly recycled into the beachface. Another major change occurred when waste discharges ended, and the former sediments and beachrock started to be eroded to their current state.The present study has been funded by the Universidad del PaĂs Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), research group GIU18/16317/05; MINECO/MCI/ERDF-EU project PID2019-105670GB-I00/AEI/10.13039/501100011033 of the Spanish Government
EstratigrafĂa y sedimentologĂa del Alcudiense superior en los anticlinorios de Ibor y Navezuelas-Robledollano
Tesis Univ. Complutense de Madrid, Facultad de Ciencias GeolĂłgicas, Departamento de EstratigrafĂa, leĂda el 3 de diciembre de 1985.Depto. de Geodinámica, EstratigrafĂa y PaleontologĂaFac. de Ciencias GeolĂłgicasTRUEProQuestpu
EstratigrafĂa y sedimentologĂa del Alcudiense superior en los anticlinorios de Ibor y Navezuelas-Robledollano
Tesis Univ. Complutense de Madrid, Facultad de Ciencias GeolĂłgicas, Departamento de EstratigrafĂa, leĂda el 3 de diciembre de 1985.Depto. de Geodinámica, EstratigrafĂa y PaleontologĂaFac. de Ciencias GeolĂłgicasTRUEProQuestpu
Geological factors of the Guadalajara landscapes (Central Spain) and their relevance to landscape studies
The landscapes of a territory are the consequence of its history; overlapped geological, vegetable and cultural histories
usually exist on a landscape. At the Mediterranean domain, however, a translucent vegetation exists, and its history is
closely related to the geologic and cultural histories, because low-technology agricultural uses on a different hardness rock
background control vegetation. Thus, in areas like the Guadalajara province, the geologic composition and the human activities
can be considered the primary conditions for landscape configuration. Both condition the typologies, distribution and relative
importance of the geotic, biotic and anthropogenic components of landscapes. A complex network of interrelations among all
them exists but, in the base of which lie the geology of the territory, included relief, because it has amore independent influence
since man cannot modify the geologic factors; such as the colour of the rocks, the size and distribution of rock bodies, the
palaeogeographic domains and the tectonic structure all which control landscape development and configuration. Moreover,
geology influences conditions and even limit, the presence, typologies and development of the biotic and anthropogenic
elements. These factors also have a major relevance for environmental management, educational and economic policy, and,
in some cases, for environmental impact assessment.Depto. de Geodinámica, EstratigrafĂa y PaleontologĂaFac. de Ciencias GeolĂłgicasTRUEpu
Geological factors of the Guadalajara landscapes (Central Spain) and their relevance to landscape studies
The landscapes of a territory are the consequence of its history; overlapped geological, vegetable and cultural histories
usually exist on a landscape. At the Mediterranean domain, however, a translucent vegetation exists, and its history is
closely related to the geologic and cultural histories, because low-technology agricultural uses on a different hardness rock
background control vegetation. Thus, in areas like the Guadalajara province, the geologic composition and the human activities
can be considered the primary conditions for landscape configuration. Both condition the typologies, distribution and relative
importance of the geotic, biotic and anthropogenic components of landscapes. A complex network of interrelations among all
them exists but, in the base of which lie the geology of the territory, included relief, because it has amore independent influence
since man cannot modify the geologic factors; such as the colour of the rocks, the size and distribution of rock bodies, the
palaeogeographic domains and the tectonic structure all which control landscape development and configuration. Moreover,
geology influences conditions and even limit, the presence, typologies and development of the biotic and anthropogenic
elements. These factors also have a major relevance for environmental management, educational and economic policy, and,
in some cases, for environmental impact assessment
Ahora / Ara
La cinquena edició del microrelatari per l’eradicació de la violència contra les dones de l’Institut Universitari d’Estudis Feministes i de Gènere «Purificación Escribano» de la Universitat Jaume I vol ser una declaració d’esperança. Aquest és el moment en el qual les dones (i els homes) hem de fer un pas endavant i eliminar la violència sistèmica contra les dones. Ara és el moment de denunciar el masclisme i els micromasclismes començant a construir una societat més igualità ria.
Cadascun dels relats del llibre Ă©s una denĂşncia i una declaraciĂł que ens encamina cap a un mĂłn millor