Report on the 13th Symposium on the Teaching of Geology: Alicante, 5th to 10th July 2004

El XIII Simposio sobre Enseñanza de la Geología, convocado por la AEPECT y organizado por el Instituto de Ciencias de la Educación de la Universidad de Alicante, se celebró entre el 5 y el 10 de julio de 2004 en Alicante. En el presente artículo se revisa el programa de actividades así como la evaluación de esta actividad realizada por los asistentes.The 13th Symposium on the Teaching of Geology, called by AEPECT and organised by the Institute for Educational Studies (ICE) of the University of Alicante, was held between the 5th and 10th July 2004 in Alicante. This article analyses the activity programme of the event as well as the participants’ evaluation

Why are so different the Crevillente and Abanilla mountain ranges?

The Crevillente and Abanilla mountain ranges form the same structural lineation but show a quite different morphology. The first one is made by calcareous rocks mainly jurassic and cretaceous likewise the Abanilla is made by keuper facies which includes blocks. This keuper facies are not Triassic but Miocene which are interpreted as an ancient salt glacier. Their different litologies of both sierras is due to the activity of the Puerto de Barinas Fault, a transverse fault to the Crevillente-Abanilla lineament. This litological difference in the same structural lineament could be explained as produced before (pre-late Tortonian) the elevation of both sierras (latest Messinian).Este trabajo ha sido realizado en el marco del proyecto BTE 2003-01113 y del grupo de investigación GRUPOS03/085 (Generalitat Valenciana)

Intervención social contra el racismo y la xenofobia

Intervención social contra el racismo y la xenofobi

The Bajo Segura Basin (SE Spain): implications for the Messinian salinity crisis in the Mediterranean margins

The analysis of the Messinian and Pliocene stratigraphy of the Bajo Segura Basin (a marginal basin of the western Mediterranean) has revealed three synthems deposited in a high sea-level context: T-MI (late Tortonian-Messinian), MII (Messinian), and P (early Pliocene), bounded by two lowstand erosional surfaces (intra-Messinian and end-Messinian unconformities). With respect to the salinity crisis, we propose the following series of events: 1) pre-evaporitic or pre-crisis phase (T-MI synthem); 2) first sea-level fall and subaerial exposure (intra-Messinian unconformity), possibly related to the precipitation of the Lower Evaporites; 3) syn-evaporitic phase (MII synthem), recorded both by selenitic gypsum (Upper Evaporites) as well as by lagoon deposits (Lago-Mare); 4) second sea-level fall and subaerial exposure (end-Messinian unconformity), characterized by deeply incised palaeovalleys; and 5) postevaporitic or post-crisis phase (P synthem), which coincides with the definitive restoration of open marine conditions in the basin. A combined biostratigraphic and magnetostratigraphic study revealed that all the events linked to the salinity crisis (from the end of the pre-evaporitic phase to the beginning of the post-evaporitic phase) occurred within the chron C3r (c. 5.9-5.2 Ma).Financial aid was provided by Research Projects BTE2003-05047, CGL2005-06224BTE (MEC), CGL2007-65832/BTE (MEC), GV04B-629 (Generalitat Valenciana) and “Paleoenvironmental Changes” Group (UA)

The 8.2-event record on the Alicante marine continental shelf (SE, Spain)

High resolution seismic profiles of the Alicante continental shelf have been studied identifying a seismic prism which top at about -20 m below today sea-level. The prism is covered by recent sediments and can be interpreted as formed during a short interval of stand-by in the general transgression after the last glacial maximum. The -20 m level have been compared with the holocene Mediterranean sea-level-curve to propose an age of about 8 ka BP coinciding with the «8.2 ka cooling event» that was an abrupt, widespread climate instability. The prism top is deeper in the northern seismic profiles thus indicating a more subsidence that the southern coastal shelf where an erosion surface with rocky shoals configure the sea botto

Epistemología histórica e historiografía

Ensayos cuyo tema gira sobre la historicidad de la razón científica que ahora es cuestionada desde la misma ciencia. Desde ella se puede seguir una línea desde Gaston Bachelard a Michel Foucault del lado de la reflexión francesa, y, del lado anglosajón, desde el giro lingüístico al programa fuerte de la Escuela de Edimburgo. Por todo esto no es azaroso que la epistemología histórica y la historiografía surjan simultáneamente a partir de la década de 1960. Obras tan significativas como la de Kuhn en el ámbito de la ciencia, o como las de Foucault, se inscriben en este momento. Comparten pues, esta misma preocupación: repensar las condiciones de posibilidad del conocimiento y las de la historiografía. El libro está dividido en dos partes. La primera contiene las reflexiones que incumben directamente a la epistemología histórica, y la segunda parte, las de historiografía. Ambas tienen en común la centralidad de la historicidad.Norma Durán R. A., coordinador