A5010622078- Geological and Geophysical Studies Worldwide
- Geological formations and processes
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Archaeological and Historical Studies
- Archaeological and Geological Studies
- Hydrocarbon exploration and reservoir analysis
- Marine and environmental studies
- earthquake and tectonic studies
- Geological and Tectonic Studies in Latin America
- Evolution and Paleontology Studies
- Paleontology and Evolutionary Biology
- Marine Bivalve and Aquaculture Studies
- Marine and coastal ecosystems
- Geochemistry and Geologic Mapping
- Ocean Acidification Effects and Responses
- Cephalopods and Marine Biology
- Methane Hydrates and Related Phenomena
- Geochemistry and Elemental Analysis
- Chemical and Environmental Engineering Research
- Atmospheric and Environmental Gas Dynamics
- Marine Biology and Ecology Research
University of the Basque Country
2008-2023
Istituto Nazionale di Geofisica e Vulcanologia
2006
During the Aptian and Albian thick terrigenous carbonate successions of sediments up to 5000 m thick, including shallow water rudist limestones (Urgonian facies), were deposited in Basque– Cantabrian Basin northern Spain as a result an intense rift-related subsidence. Based on criteria from surface subsurface data, syn-sedimentary faults, folds, angular unconformities, diapirs sub-basins are distinguished within Urgonian successions. Faults grouped into N– S, E– W, NW– SE NE– SW families...
Abstract However salt has a viscous rheology, overburden rocks adjacent to diapirs have brittle rheology. Evidence of deformation within the been described from worldwide. Gravity‐driven deposits are also present along flanks several diapirs. The well‐known example L P opa B asin in northern M exico shows that such may be organized into halokinetic sequences. This leads questions: (i) How does diapir growth contribute deformation? (ii) Are sequence models valid for other areas beyond asin....
Emplacement of shallow magmatic laccoliths can result in the development dome-shaped forced folds and fractures overburden at depositional surface. These have been described from both outcrop studies seismic interpretation; however, main controls on fold growth fracture remain unclear and, some cases, controversial. This paper presents a new approach analysis laccolith intrusions folds. In this study, deep-water deposits an Basque-Cantabrian Basin (north Iberia) record coeval formation...
Abstract In the mid‐Cretaceous Lasarte sub‐basin ( LSB ) [northeastern Basque‐Cantabrian Basin BCB )] contemporaneous and syn‐depositional thin‐ thick‐skinned extensional tectonics occur due to presence of a ductile detachment layer that decoupled extension. Despite interest in extension modes rift basins bearing intra‐stratal layers, complex cases remain poorly understood. , field results based on mapping, stratigraphic, sedimentological structural data show relationship between growth...
ABSTRACT The Middle Albian Ondarroa turbidite system is a coarse grained, deep water unit which outcrops in the north‐eastern part of Basque‐Cantabrian region, west Pyrenees. It about 18 km long and 7 wide, shows an unusual ‘L’shape resulting from both direct morphotectonic confinement presence nearby shallow carbonate buildups. Eight main facies have been distinguished within this system: (1) clast‐supported conglomerates; (2) mud‐supported (3) slump deposits; (4) normally graded pebbly...
Other| June 01, 2004 Paleodepth and Paleoenvironment of Dactyloidites ottoi (Geinitz, 1849) from Lower Cretaceous Deltaic Deposits (Basque-Cantabrian Basin, West Pyrenees) LUIS M. AGIRREZABALA; AGIRREZABALA 1Estratigrafia eta Paleontologia Saila, Zientzia Fakultatea, Euskal Herriko Unibertsitatea, 644 P.K., 48080 Bilbo, Spain, ggpagmul@lg.ehu.es Search for other works by this author on: GSW Google Scholar JORDI DE GIBERT 2Departament d'Estratigrafia, i Geociències Marines, Facultat de...
Abstract Stratigraphic, structural, palaeocurrent and palaeomagnetic analyses of Upper Albian deep-water deposits in around the Deba block (Northern Iberia) are presented. Results indicate an anticlockwise vertical-axis rotation this by 35° during a maximum time span c. 1 Ma (Late intra- C. auritus ammonite Subzone). This syndepositional is interpreted to be consequence coeval activity conjugate major sinistral strike-slip faults minor (antithetic) dextral faults, which border block. On base...
Abstract Albian dinosaur tracks from the Monte Grande Formation (Basque–Cantabrian Basin) are described. Sedimentary succession shows seven different facies associations (FAs) with four track-bearing levels (levels 1–4) of a braid delta system. FA 4, proximal crevasse subdelta, preserves in 2 and 3 theropod, possibly sauropod undetermined tracks, as well Ophiomorpha Skolithos traces. 5, middle presents cross-section 1 besides , locally Teichichnus other layers. Both FAs have same general...
The mid-Cretaceous Black Flysch Group and Plentzia Formation constitute two key lithostratigraphic units in the evolution of Pyrenean rift system but many their paleoenvironmental characteristics are poorly known. In this work, a microfaunal analysis (planktonic benthic foraminifera ostracods) these at Armintza section has been carried out order to interpret conditions (paleodepth, oxygen level water masses) which they deposited, relate them contemporary tectono-sedimentary settings. Based...
Research Article| March 01, 2002 Syntectonic deposits and punctuated limb rotation in an Albian submarine transpressional fold (Mutriku village, Basque-Cantabrian basin, northern Spain) L.M. Agirrezabala; Agirrezabala 1Estratigrafia eta Paleontologia Saila, Euskal Herriko Unibertsitatea, 644 postakutxa, 48080 Bilbao, Spain Search for other works by this author on: GSW Google Scholar H.G. Owen; Owen 2Natural History Museum, Cromwell Road, London SW7 5BD, UK J. García-Mondéjar 3Estratigrafia...
Strontium isotopes have seen common use as a tracer of volcanic-influenced fluids at hydrothermal vents and cold seeps hosted by sedimented rifts. However, for some fluid emissions, no apparent contribution volcanogenic Sr has been observed, despite geological or seismic evidence suggesting magmatic involvement in the expulsion. Here, we explore behaviour during fluid-rock interactions rift based on isotope elemental composition Albian hydrocarbon-seep carbonates Basque-Cantabrian Basin,...
Recently discovered Albian submarine diatremes sample tectonites from the Basque-Cantabrian Basin concealed basement.Garnet-sillimanite gneiss xenoliths provide petrologic, petrofabric, and radiometric evidence on a so-far unidentified early Permian (ca.280-275 Ma) highgrade regional metamorphism.It is interpreted as syntectonic event recorded at middle to lower crustal settings related Variscan orogeny.This metamorphism 25-30 m.y.younger than high-grade preserved in axial zone of Pyrenees...
En este trabajo se describe la estratigrafía y sedimentología de Formación Conglomerados Andatza. Mediante el análisis facies han interpretado tres asociaciones principales correspondientes a un sistema turbidítico (de grano grueso) al talud: interno (o cañón), talud fangoso alto gradiente otro bajo gradiente. La distribución cartográfica las junto con paleocorrientes describen modelo sedimentario grueso en forma “L” para los Andatza, cuya morfología fue controlada por fallas normales...
During the Aptian and Albian thick terrigenous carbonate successions of sediments up to 5000 m thick, including shallow water rudist limestones (Urgonian facies), were deposited in Basque– Cantabrian Basin northern Spain as a result an intense rift-related subsidence. Based on criteria from surface subsurface data, syn-sedimentary faults, folds, angular unconformities, diapirs sub-basins are distinguished within Urgonian successions. Faults grouped into N– S, E– W, NW– SE NE– SW families...