Maar-diatreme infill features recorded in borehole imaging

Oriented borehole images recorded with an ultrasonic acoustic televiewer and continuous coring recovery has allowed the characterization of different facies and volcanic processes involved in the infill of a maar-diatreme volcano type. Maar-diatremes are associated with strong explosions throughout most of their development, focused along feeder dikes and generally attributed to magma-water interaction. In the case study of Camp dels Ninots maar-diatreme (Girona, Spain) we have recognized four facies types located in the center of the maar-diatreme: volcanic ash, phreatomagmatic breccia with lithics and juveniles, vesicular pyroclasts (scoria), massive basalt or welded pyroclastic fragments. Ultrasonic televiewer images allow to characterize the different volcanic facies, since they display a different degree of reflectivity and textures. Other features such as fracturing and grain size can be directly measured on the images.Projects 2014-100575 from Departament de Cultura de and SGR2014-901 from AGAUR (both from Generalitat de Catalunya) financed the drilling campaigns.Peer Reviewe

Borehole image techniques applied to identification of chert and dolomite layers in lacustrine sediments

Geophysical logging tools, particularly ultrasonic acoustic borehole image techniques, are applied on two different wells (CP1 and CP2) to identify and characterize the lacustrine interval (40m) of the Camp dels Ninots maardiatreme infill (Pliocene, Catalan Coastal Ranges). The CP1 well was cored and also geophysical logs and oriented borehole images were acquired. CP2 hole was partially cored but logging (geophysics and borehole images) was fully undertaken. Continuous core recovery in CP1 is compared with oriented images and is further used to identify and characterize highly reflective signals in a section of CP2 borehole that was not cored. These signals are related to silicified zones and belong to discontinuous centimetric chert nodules, while indurated massive carbonates are characterized as intervals of continuous reflectance. Despite opal nodules (chert) can be relatively small, they have a distinctive response in the ultrasonic borehole images.Peer Reviewe

Cal Sitjo: A new Mesolithic to Neolithic sequence in a chert-rich region (Sant Martí de Tous, NE Iberia)

Cal Sitjo is a new archaeological sequence located in a chert-rich region of the NE Iberian Peninsula, in the town of Sant Martí de Tous (Anoia, Barcelona). The area has undergone significant anthropisation and several archaeological sites (e.g., Vilars de Tous), quarries and workshops for the exploitation of chert (e.g., La Guinardera) have been documented, corresponding to different periods. The abundance of chert made this region an almost obligatory passageway for hunter-gatherer communities such as those occupying the nearby cliffs of Cinglera del Capelló (Capellades), located at a direct distance of 15 km, as well as an ideal settlement for later farming communities. Discovered in 2019, the first excavation campaign was carried out in the fall of 2020. Dates have been obtained from a known sequence of around 8 m, providing a chronological framework that ranges from the Mesolithic to the Middle Neolithic. The preliminary results of this excavation have brought to light lithics, ceramics and charcoals from the Neolithic levels (Levels 3 and 4), and faunal, lithic and charcoal remains from the Mesolithic levels (cleaning section). Our preliminary results confirm that this sequence is an ideal location for a diachronic study of the evolution from the last hunter-gatherers to the first farmers, from a paleoenvironmental and technological perspective, as well as in terms of chert management and distribution in a territory with a great abundance of this raw material

Pre-Conference Field Trip. Monogenetic volcanism of the Catalan Volcanic Zone: Maar craters, scoria cones and rootless volcanoes of the Garrotxa volcanic field, and open fossil excavation in a Pliocene maar cráter. 7th international MAAR CONFERENCE

The field trip will start May 18 at the bus station of Olot at 7:30 am. During the first half of the day, participants will explore and discuss the evolution of La Crosa de Sant Dalmai maar volcano, the largest maar crater of the Iberian Peninsula, formed during the Pleistocene. Then, the group will debate on the stratigraphy of the basaltic tuff-ring of El Puig d’Adri and its phreatomagmatic deposits, including basaltic ignimbrites. After these geological stops, we will visit Caldes de Malavella, a beautiful village declared historical monument of national interest, with a great tradition in spas and thermal water springs since Roman Empire in time of Emperor Augustus, who called this village Aquae Calidae. Moreover, we can find Medieval architecture such as the walls of the old castle Caldes with 3 towers of s. XII and also modernist and neoclassical buildings in the old town of the village (http://www.femturisme.cat/en/villages/caldes-de-malavella). After lunch in Caldes de Malavella, the group will visit the open fossil excavation in lacustrine sediments of the Camp dels Ninots Pliocene maar crater located in the same village. During the morning of the second day, the group will visit the Montsacopa complex cinder cone that rises right in the heart of the city and is one of the five volcanoes that stand inside the city of Olot. This volcano exhibits a diversity of eruptive styles with strong evidence of vent migration controlled by tectonic features. After that, we will do a tour around the rootless volcanoes and tumuli lava field of Bosc de Tosca, with more than one hundred tossols (local name of rootless volcanoes) that have formed all along the lava flow emitted by the Puig Jordà volcano with an age of about 17,000-years old. After lunch in a popular restaurant in the region, the attendees will visit Sant Joan Les Fonts columnar-jointed lava flows. The last stop of the second day will be in the Quaternary Cairat maar volcano and their phreatomagmatic deposits. The last day of the field trip, the participants will enjoy the wonderful views and landscapes of the Garrotxa Volcanic Park and the Mediterranean coast from the Xenacs panoramic viewpoint. An important aspect of this field trip is that it will also include discussions about the relation between science and society taking into account that in this region volcanoes are present in many aspects of local society, as its cultural heritage, local history, architecture, or even in its excellent cuisine. The local people are aware of living among volcanoes and that they represent the most characteristic feature of their region, in an extent comparable or even superior to areas with more active volcanism.Peer Reviewe

Présence d’une tortue alligator dans le site Pliocène du Camp dels Ninots (Espagne

International audienceThe late Pliocene locality Camp dels Ninots is a fossil Lagerstätte that yielded an exceptionally well pre-served vertebrate fauna. Several turtles were reported from this locality and were all assigned to the living speciesMauremys leprosa.We describe here a second turtle taxon based on carapace material. This new taxon is identified asChelydropsiscf.pontica.It is the first report of a chelydrid turtle in the Pliocene of the Iberian peninsula. This discov-ery extends the range of the species to the southwest of Europe and thereby better documents the space and time distri-bution of snapping turtles before their supposedly rapid disappearance in EuropeLe site du Camp dels Ninots en Espagne est un site à préservation exceptionnel qui a livré un assemblage devertébré du Pliocène supérieur. Jusqu’à présent, de nombreuses tortues avaient été découvertes dans cette localité et ont toutes été classées dans l’espèce Mauremys leprosa. Nous décrivons ici un second taxon de tortue et l’identifions comme le chelydridé Chelydropsiscfpontica. Cette conclusion étend le registre fossile des chélydridés au Pliocène vers le sud-ouest. Elle apporte une information supplémentaire sur ce groupe juste avant sa disparition rapide du registre fossile en Europe

Procesos de Cocreación que Contribuyen al Impacto Social de la Ciencia: Aportaciones de la Red Net4Impact

Meaningful citizen participation throughout the development of research projects has increased the societal impact of science. Co-creation processes promote a more significant societal impact by aligning research with societal needs. In recent years, essential advances in citizen participation in science have been identified. However, there are still critical challenges that limit citizen interaction with scientific creations. This article provides some of the contributions made by the Net4Impact network in the face of these challenges. Specifically, we analyse co-creation processes developed by those projects that have demonstrated societal impact. This qualitative study is based on the analysis of Webinars, meetings with researchers from different scientific areas and Communicative Content Analysis. As a result, this work provides six examples of societal impact in three scientific areas: social sciences, humanities, and engineering. In addition, we analyse the characteristics and implications of the different co-creation processes developed by these successful projects.La participación ciudadana a lo largo del desarrollo de los proyectos de investigación ha demostrado aumentar el impacto social de la ciencia. Los procesos de cocreación promueven un impacto social más significativo al alinear la investigación con las necesidades sociales. En los últimos años se han identificado importantes avances en materia de participación ciudadana en la ciencia. Sin embargo, todavía existen importantes retos que limitan la interacción de la ciudadanía con las creaciones científicas. Este artículo recoge algunas de las aportaciones de la red Net4Impact frente a estos retos. Concretamente, analizamos los procesos de cocreación desarrollados por proyectos que han demostrado impacto social. Este estudio cualitativo se basa en el análisis de Webinars, reuniones con investigadores de diferentes áreas científicas y en el Análisis de Contenido Comunicativo. Como resultado, este trabajo ofrece seis ejemplos de impacto social en tres áreas científicas: ciencias sociales, humanidades e ingeniería. Además, se analizan las características e implicaciones de los distintos procesos de cocreación desarrollados por estos proyectos exitosos

Geological and paleontological Pliocene record: introducing the Camp dels Ninots maar (Catalan Coastal Ranges, Spain)

Integrated studies on maar volcanoes can lead to a strong interaction among distant research disciplines. This is the case of the studies carried out at Camp dels Ninots maar (Pliocene, Catalan Coastal Ranges, Spain) (Fig. 1), an eroded and exhumed maar crater. Despite such volcano is in a very accessible area at the surroundings of Caldes de Malavella village, it was unnoticed since 1999 when it was generally described by Vehí and co-authors (see brief historical review by Gómez de Soler et al., this volume). At first sight, the lack of outcrops should restrict the interest of this volcano to the large vertebrates remains that are excavated close to the surface, but other topics of interest have emerged, such as volcanology, paleolimnology, paleoclimatology, paleoecology, diagenetic processes etc.The Camp dels Ninots project is sponsored by projects 2014-100575, (Generalitat de Catalunya), SGR2014-901, SGR2017-1666 (AGAUR) and CGL2016-80000-P (MINECO)