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La Alberca es un yacimiento paleontológico del Mioceno Superior situado en el área del Puerto de la Cadena (Murcia, España). Allí se ha identificado una fauna de mamíferos relativamente diversa. No obstante, la información referente a sus tortugas era, hasta ahora, muy limitada. En otros yacimientos del Puerto de la cadena se han identificado abundantes restos de tortugas, asignados a Testudinidae. El estudio de las tortugas de La Alberca permite identificar un miembro de Testudinidae de gran tamaño, asignado preliminarmente a Cheirogaster cf. bolivari, y una tortuga acuática, assignada a Trionychinae. Este último hallazgo aumenta el rango de distribución estratigráfica de este grupo de quelonios en la Península Ibérica. Además, constituye la primera referencia a Trionychinae en la mitad sur de España. La revisión de material inédito permite identificar la presencia de Trionychinae en otros afloramientos del Puerto de la Cadena La Alberca is a fossil site of the Late Miocene of the area of Puerto de la Cadena (Murcia, Spain). A mammalian fauna with relatively high diversity has been identified there. However, the information about the turtles was, until now, very limited. Abundant turtles, assigned to Testudinidae, have been recognized in other sites of Puerto de la Cadena. The study of the turtles from La Alberca allows to identify a large taxon of testudinid turtle, assigned to Cheirogaster cf. bolivari, and a aquatic turtle, assigned to Trionychinae. This finding broadens the stratigraphic distribution of the group in the Iberian Peninsula. In addition, it constitutes the first reference to Trionychinae in the southern half of Spain. The review of unpublished material allows to identify Trionychinae in other sites of Puerto de la Cadena

In Rambla del Pizcalejo (Caravaca, Murcia, Spain) new Proboscidea fossil remains were found. In this paper are described all postcranial bones belonging to a 2-4 years old Mammuthus. Stratigraphycal and mollusc data confirm the lacustrine paleoenvironment. The remains shouldn’t have suffered a hard transport; neither should their time of exposure have been long. The date of the remains is not precise due to the lack of chronostratigraphic and biostratigraphic data. It is only the assignment of the remains to the genus Mammuthus that allows to surmise a period about Plio-Pleistocene

In Rambla del Pizcalejo (Caravaca, Murcia, Spain) new Proboscidea fossil remains were found. In this paper are described all postcranial bones belonging to a 2-4 years old Mammuthus. Stratigraphycal and mollusc data confirm the lacustrine paleoenvironment. The remains shouldn’t have suffered a hard transport; neither should their time of exposure have been long. The date of the remains is not precise due to the lack of chronostratigraphic and biostratigraphic data. It is only the assignment of the remains to the genus Mammuthus that allows to surmise a period about Plio-Pleistocene

The Fortuna section has been studied in order to select a suitable section in Spain that could be a good candidate to define the Ypresian/Lutetian boundary stratotype. At present, this section is the most suitable, mainly because it is a complete marine section, well exposed and very rich in microfossils. A variation of mineralogical composition on the clays coincides with the most important change in planktonic foraminifera across the Y/L boundary. At this location, the data allowed us to infer a transgressive event associated with important hot and wet climatic changes that are the origin of an alteration and neoformation processes of clay minerals

The Sierra de Quibas is mainly a Lower Jurassic carbonated relief. Its main structure is a klippe of Middle Subbeticon Southern Prebetic. The internal structure is a NE-SW anticlinorium. Detailed geological mapping (E. 1:25,000) has pointed to anomalous folds (almost N-S) caused by the halokinétic action ofTriassic materials. Also has been detected a Neotectonic activity starting in the Upper Miocene with almost N-S stresses which have reactivated some faults; the N-S faults previously compressive are now distensive. In the SE edge of the Sierra de Quibas there is an important Pleistocene paleontological site in a karstic cave filled up with reddish detritic material within the Lower Jurassic dolomites, controlled by NE-SW faults

The Sierra de Quibas is mainly a Lower Jurassic carbonated relief. Its main structure is a klippe of Middle Subbeticon Southern Prebetic. The internal structure is a NE-SW anticlinorium. Detailed geological mapping (E. 1:25,000) has pointed to anomalous folds (almost N-S) caused by the halokinétic action ofTriassic materials. Also has been detected a Neotectonic activity starting in the Upper Miocene with almost N-S stresses which have reactivated some faults; the N-S faults previously compressive are now distensive. In the SE edge of the Sierra de Quibas there is an important Pleistocene paleontological site in a karstic cave filled up with reddish detritic material within the Lower Jurassic dolomites, controlled by NE-SW faults

The Fortuna section has been studied in order to select a suitable section in Spain that could be a good candidate to define the Ypresian/Lutetian boundary stratotype. At present, this section is the most suitable, mainly because it is a complete marine section, well exposed and very rich in microfossils. A variation of mineralogical composition on the clays coincides with the most important change in planktonic foraminifera across the Y/L boundary. At this location, the data allowed us to infer a transgressive event associated with important hot and wet climatic changes that are the origin of an alteration and neoformation processes of clay minerals

Séveral sections has been studied across the Murcia Region in arder to select a suitable section in Spain that could be a good candidate to define the Ypresian/Lutetian boundary stratotype. The sections of Casa Carreño, Quipar and Fortuna contain sediments along the Ypresian/Lutetian transition, being the Fortuna section the most suitable, mainly because it is a complete marine section, well exposed and very rich in planktic microfossils. The following planktic foraminifera biozones and subzones has been identified: Acarinina pentacamerata Biozone, with Subbotina boweri Subzone, and Truncorotaloides praetopilensis Subzone (Ypresian, Early Eocene), Hantkenina nuttalli Biozone, with Hantkenina nuttalli Subzone, Clogigerapsis subconglobata Subzone, and Clobigerapsis kugleri Biozone (Lutetian, Middle Eocene)

Séveral sections has been studied across the Murcia Region in arder to select a suitable section in Spain that could be a good candidate to define the Ypresian/Lutetian boundary stratotype. The sections of Casa Carreño, Quipar and Fortuna contain sediments along the Ypresian/Lutetian transition, being the Fortuna section the most suitable, mainly because it is a complete marine section, well exposed and very rich in planktic microfossils. The following planktic foraminifera biozones and subzones has been identified: Acarinina pentacamerata Biozone, with Subbotina boweri Subzone, and Truncorotaloides praetopilensis Subzone (Ypresian, Early Eocene), Hantkenina nuttalli Biozone, with Hantkenina nuttalli Subzone, Clogigerapsis subconglobata Subzone, and Clobigerapsis kugleri Biozone (Lutetian, Middle Eocene)

The Lorca Basin is located in the Betic Ranges (SE o f Spain) over the contact between the Betic domain s.s. (in te rn a l zones) and the Subbetic one (external zones). For the complementary use of the mineralogical and tectosedimentary analysis it has been necessary the realization of the geologic cartography. It have been differentiated five continental formations of the Quaternary and twelve neogenes formations dated from the upper Burdigalian to the Pliocene. They were originated in marine environments with entrance of continental contributions except for the upper Messinian-PUocene which have a fluvial-lacustrine origin. The most abundant material are marls, sandstones, lutites, gypsiferous levels, conglomerates, sands and limestones

En este trabajo s e analizan los principales georrecursos culturales de la cuenca de Lorca (provincia de Murcia) de acuerdo con nuestras recientes investigaciones sobre varios aspectos geológicos en esta área (estratigrafía, litología, tectónica y evolución paleogeográfica). Se definen casi diez áreas de interés geológico bajo un punto de vista científico y didáctico con objeto de potenciar su uso en programas científicos y ambientales. Para resumir este trabajo se concluye que es necesario un gran apoyo de las autoridades administrativas locales y regionales para conservar esta zonas de indudable valor paleogeográfico, In this paper we analyze the main cultural georresources of the Lorca basin (Murcia province) according to our recent investigations into several geologic aspects in this area (stratigraphy, lithology, tectonics, and paleogeographic evolution ). N e a rly ten places o f geologic interest from ascientifiand didactic point of view are defined in order to improve its use in scientific and ambiental programmes. To sum up this work we conclude it is necessary a great support of all they local and regional administrative government in order to preserve this zone with undoubted paleogeographic value

The clay mineral association of the Lorca basin (Murcia) is built by muscovite, chlorite (clinochlore), montmorillonite, kaolinite and something of paragonite. The application of statistical methods, the factor analysis and the analysis mineralogical: space-temporal distribution, mineral associations, mufua/ relationships and crystalchemical parameters, have allowed to know the possible source areas, the processes of transport and sedimentation-and climatology in each TSU

The clay mineral association of the Lorca basin (Murcia) is built by muscovite, chlorite (clinochlore), montmorillonite, kaolinite and something of paragonite. The application of statistical methods, the factor analysis and the analysis mineralogical: space-temporal distribution, mineral associations, mufua/ relationships and crystalchemical parameters, have allowed to know the possible source areas, the processes of transport and sedimentation-and climatology in each TSU