125 research outputs found

    Revisión de los Ammonoideos del Lías español depositados en el Museo Geominero (ITGE, Madrid)

    Get PDF
    Se revisan desde el punto de vista taxonómico, los fósiles de ammonoideos correspondientes al Lías español que se encuentran depositados en el Museo Geominero. La colección está compuesta por ejemplares procedentes de 67 localidades españolas, pertenecientes a colecciones de diferentes autores. Se identifican los ordenes Phylloceratina, Lytoceratina y Ammonitina, las familias Phylloceratidae, Echioceratidae, eoderoceratidae, Liparoceratidae, Amaltheidae, Dactylioceratidae, Hildoceratidae y Hammatoceratidae y las subfamilias Xipheroceratinae, Arieticeratinae, Harpoceratinae, Hildoceratinae, Grammoceratinae, Phymatoceratinae y Hammatoceratinae correspondientes a los pisos Sinemuriense, Pliensbachiense y Toarciense

    Hammatoceratinae (Ammonitina) del Toarciense superior y Aaleniense en la Cordillera Ibérica

    Get PDF
    Tesis Universidad Complutense de Madrid, Facultad de Ciencias Geológicas, 1992Depto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasTRUEpu

    Bouleiceras (Hildoceratidae, Ammonitina) from the lower Toarcian (Jurassic) of the Iberian Range (Spain): Taxonomy, stratigraphic distribution and insights on its dispersal

    Get PDF
    Bouleiceras is a very rare genus among the rich assemblages of ammonoids from the lower Toarcian of the Iberian Range. So far, only two dozen specimens have been recorded in numerous field campaigns carried out since 1965 by different authors. The interest of this taxon lies in its peculiar paleogeographical distribution in comparison with most other ammonoids of the same age. A review of these specimens is carried out, including those obtained in previous works and others recently collected in selected localities. Based mainly on the differences in the shape of the ventral section and the suture line, seven species have been identified; two of which are new: Bouleiceras ibericum nov. sp. and Bouleiceras? betetensis nov. sp. All the reviewed specimens are recorded in the Semicelatum Subzone of the Tenuicostatum Zone and the Elegantulum Subzone of the Serpentinum Zone from the Central Sector and the Levantine Sector of the Iberian Range. The global distribution of the genus is summarized from the known data, and its possible dispersal routes are analyzed, as well as the factors that could have conditioned them

    La diferenciación paleogeográfica de la Cuenca Catalana al principio del Jurásico Medio.

    Get PDF
    Se propone un nuevo sistema de unidades litoestratigráficas, válido para los materiales del Toarciense, Aaleniense y Bajociense de la Cuenca Catalana. Las pautas de distribución de estas unidades litoestratigráficas y las variaciones de facies a escala zonal permiten delimitar tres sectores paleogeográficos al principio del Jurásico Medio: el sector de Tivissa-Salou, el sector de Alfara- Cardó y el sector de Los Puertos de Beceite. Estos tres sectores se diferenciaron progresivamente, entre sí y respecto a la Cuenca Ibérica, condicionados por fallas sinsedimentarias durante el Toarciense, el Aaleniense y el Bajociense. Dos megaciclos ambientales de profundización/somerización tuvieron lugar en la Cuenca Catalana durante el tránsito Jurásico Inferior-Medio. Los máximos transgresivos de estos dos ciclos de segundo orden ocurrieron respectivamente en los biocronos Bifrons (Toarciense) y Niortense (Bajociense). Estos dos megaciclos estuvieron separados por un máximo regresivo durante el Biocrón Murchisonae (Aaleniense medio). La Plataforma de Tortosa, que comprende los sectores de Tivissa-Salou y Alfara-Cardó, alcanzó su máxima subsidencia durante el Bajociense superior. [ABSTRACT] A new system of lithostratigraphical units, valid for the Toarcian, Aalenian and Bajocian deposits of the Catalan Basin is defined. Distribution patterns of these lithostratigraphical units and variations of facies to a zonal scale enable the interpretation of three palaeogeographical sectors at the beginning of the Middle Jurassic: Tivissa-Salou, Alfara-Cardó and Los Puertos de Beceite. These three sectors, conditioned by synsedimentary faults, were progressively differentiated through the Toarcian, Aalenian and Bajocian. Two environmental deepening/shallowing megacycles were developed in the Catalan Basin during the latest Early Jurassic and the earliest Middle Jurassic. The transgressive peaks of these two second-order cycles occurred respectively in the Bifrons (Toarcian) and Niortense (Bajocian) biochrones. Both megacycles were separated by a regressive peak during the Murchisonae Biochron (Aalenian). The Platform of Tortosa, comprising the sectors of Tivissa- Salou and Alfara-Cardó, reached the maximum subsidence during the late Bajocian

    Ultraviolet-Visible and High-Resolution Mass Spectrometry for the Identification of Cyclopropyl-Fentanyl in the First Fatal Case in Spain

    Get PDF
    A 24-year-old white male was found dead at home in Madrid, Spain.The medical examiner indicated a dead person sat forward on thebed. The suspected cause of death was poly-drug intoxication, sincedrug paraphernalia was located at home and the absence of injuries inAQ8arms, forearms and hands was observed. The autopsy was performed48 h later.The histological examinations performed on stained samplesshowed no traumatic signs in both the cranial and brain cavity. Bothlungs presented intense congestive parenchyma, with fluid and darkblood. Pericardial sac (240-g heart) presented without findings ofinterest whereas spirits presented fluid and dark blood. In the abdominalcavity, the liver presented slight congestion. The stomach, withdark-brown pasty content, had the appearance of poorly digestedblood, with hyperemia in the mucosa. Kidneys were very congestedand there was a small volume of cloudy urine in the bladder.All biological samples (blood, vitreous humor and urine) werecollected at autopsy by the medical examiner and sent to INTCF.Later, non-biological samples (paraphernalia) were also submittedfrom the police unit to INTCF, ordered by the judge for a comprehensivetoxicological screening

    RiSD: a methodology for building i* strategic dependency models

    Get PDF
    Goal-oriented models have become a consolidated type of artefact in various software and knowledge engineering activities. Several languages exist for representing such type of models but there is a lack of associated methodologies for guiding their construction up to the necessary level of detail. In this paper we present RiSD, a methodology for building Strategic Dependency (SD) models in the i* notation. RiSD is defined in a prescriptive way to reduce uncertainness when constructing the model. RiSD also tackles two fundamental issues: on the one hand, it tends to reduce the average size of the resulting models and, on the other hand, it allows including some traceability relationships in the resulting models. As a result, we may say that RiSD increases the understandability of goal-oriented models whilst improving all construction.Peer ReviewedPostprint (author’s final draft

    A comparative analisys of i*-based agent-oriented modeling languages

    Get PDF
    Agent-oriented models are frequently used in disciplines such as requirements engineering and organizational process modelling. i* is currently one of the most widespread notations used for this purpose. Due to its strategic nature, instead of a single definition, there exist several versions and variants, often not totally defined and even contradictory. In this paper we present a comparative study of the three most widespread i* variants: Eric Yu’s seminal proposal, the Goal-oriented Requirement Language (GRL) and the language used in the TROPOS method. Next, we propose a generic conceptual model to be used as reference framework of these three variants and we show its use for generating specific models for the three mentioned variants, as well as for other existing proposals.Peer ReviewedPostprint (author’s final draft

    La Plataforma de Tortosa (Cuenca catalana) durante el Jurásico Medio: unidades litoestratigráficas, paleogeografía y ciclos ambientales

    Get PDF
    El presente trabajo constituye una guía de campo de un transecto de la Plataforma de Tortosa, en dirección SW-NE, desde el Estrecho de Beceite hacia las proximidades del Alto de Tarragona. Los afloramientos situados en las proximidades de Alfara, Tivenys, Llaberia y Cap Salou permiten reconocer las sucesivas unidades litoestratigráficas, así como las variaciones de espesor y facies en los distintos sectores, facilitando la reconstrucción paleogeográfica y secuencial de la Cuenca Catalana para este intervalo temporal, entre el Toarciense y el Oxfordiense. Los materiales del Jurásico Medio en la Cuenca Catalana forman una potente sucesión carbonática que sobrepasa los 350 m de potencia, y muestran una fuerte reducción de espesor hacia el norte (área de Llaberia) y el nordeste (el llamado Alto de Tarragona). Estos materiales han sido estudiados a partir de los datos de superficie (más de 30 perfiles estratigráficos) y de subsuelo (más de 30 sondeos petrolíferos). Se han reconocido tres formaciones que habían sido previamente definidas: la Fm. Sant Blai, preferentemente carbonatada (Toarciense inferior a Bajociense inferior), la Fm. Cardó, preferentemente margosa (Bajociense inferior a Bajociense superior), y la Fm. La Tossa, formada por calizas y dolomías (Bajociense superior a Calloviense medio). En la Fm. Sant Blai se distingue a su vez cinco miembros estratigráficamente sucesivos. Por encima de la Fm. La Tossa se desarrolla la Fm. Serra de la Creu, formada por calizas bioclásticas y peloidales (Oxfordiense medio a superior). Las variaciones de facies y de espesor son indicativas de que la sedimentación estuvo controlada por fracturas de basamento, que condicionaron el desarrollo de diversas plataformas carbonáticas así como sucesivos cambios relativos del nivel del mar. No obstante, las discontinuidades de mayor amplitud, localizadas en el Aaleniense (Biozona Murchisonae), en el límite Batboniense - Calloviense (Biozona Discus) y en el límite Calloviense - Oxfordiense, se encuentran también en la Cuenca Ibérica y fueron debidas a factores alocíclicos. Las profundidades relativas de estas áreas de plataforma epicontinental alcanzaron valores mínimos durante el desarrollo de estas tres discontinuidades mencionadas, que localmente pudieron corresponder a episodios prolongados de exposición subaérea. Los máximos valores batimétricos se alcanzaron durante el Bajociense superior (Biocrón Niortense) y durante el Oxfordiense medio (biocronos Schilli y Rotoides). Durante estos intervalos de máxima profundización relativa se registraron las únicas evidencias de colonización generalizada de la Cuenca Catalana por poblaciones de ammonites
    corecore