A5002572710- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies Worldwide
- Geology and Paleoclimatology Research
- Geological formations and processes
- Geological and Geochemical Analysis
- Archaeological and Geological Studies
- Archaeological and Historical Studies
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Elemental Analysis
- Geological and Tectonic Studies in Latin America
- Fossil Insects in Amber
- Geochemistry and Geologic Mapping
- Geomagnetism and Paleomagnetism Studies
- Marine and coastal plant biology
- Insect and Arachnid Ecology and Behavior
- Plant Diversity and Evolution
- Pleural and Pulmonary Diseases
- Paleontology and Evolutionary Biology
- Marine Biology and Ecology Research
- Phase Equilibria and Thermodynamics
- Hymenoptera taxonomy and phylogeny
- CO2 Sequestration and Geologic Interactions
- Evolution and Paleontology Studies
- Pleistocene-Era Hominins and Archaeology
- Medical research and treatments
Instituto Geológico y Minero de España
2014-2024
Universidad Complutense de Madrid
2017
IFP Énergies nouvelles
2017
University of the Basque Country
1994-2005
University of California, Riverside
1996
Hospital San Juan de la Cruz
1976
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...
Stable isotope and trace element analyses of 230 Jurassic (Pliensbachian–Toarcian) samples from northern Spain have been performed to test the use geochemical variations in fossils (belemnites brachiopods) whole‐rock hemipelagic carbonates as palaeoceanographic indicators. Although succession analysed (Reinosa area, westernmost Basque–Cantabrian Basin) has subject severe thermal alteration during burial diagenesis, appear be well preserved. The degree diagenetic assessed through application...
Well preserved calcitic belemnite samples from the Basque-Cantabrian basin of northern Spain have been analyzed to improve our current understanding chemistry seawater as an index paleoceanographic changes during Early Jurassic, a period punctuated by times oceanic anoxia and global mass extinctions. Because oxygen-isotope composition calcite depends not only on temperature but also salinity, we present here combination Sr/Ca, Mg/Ca, δ18O analyses that helped us evaluate both effects...
An integrated stratigraphical, sedimentological, geochemical and sequential analysis has been carried out on the Liassic rocks of Basque–Cantabrian basin in northern Spain using outcrop subsurface data. The study documents progressive drowning backstepping an epeiric carbonate ramp that originated during worldwide late Triassic–early Jurassic transgression. Two major depositional systems have recognized within succession: (1) a Sinemurian shallow-marine ramp, which reflects marine...
The El Soplao site is a recently-discovered Early Albian locality of the Basque-Cantabrian Basin (northern Spain) that has yielded number amber pieces with abundant bioinclusions. amber-bearing deposit occurs in non-marine to transitional marine siliciclastic unit (Las Penosas Formation) interleaved within regressive-transgressive, carbonate-dominated Lower Aptian-Upper sequence. Las Formation corresponds regressive stage this sequence and its turn it splits into two smaller...
Abstract: El Soplao outcrop, an Early Cretaceous amber deposit recently discovered in northern Spain (Cantabria), has been shown to be the largest site of with arthropod inclusions that found so far. Relevant data provided herein for biogeochemistry amber, palynology, taphonomy and bioinclusions complement those previously published. This set suggests at least two botanical sources deposit. The ñrst (type A amber) strongly supports a source related Cheirolepidiaceae, second B shows...
Abstract Second‐order transgressive–regressive (T–R) cycles, previously recognized using sedimentological criteria in Lower Jurassic hemipelagic deposits from northern Spain, are distinguishable based upon bulk‐rock organic geochemistry [total carbon (TOC) and hydrogen index (HI)] the stable isotope compositions belemnite rostra. There is a coincidence between regressions decreasing δ 13 C bel , TOC HI values, transgressions increasing values. The 18 O Mg/Ca records rostra not always phase...
ABSTRACT Four contrasting carbonate sequences developed in a tectonically active, extensional setting the Lower Cretaceous (Aptian-Albian) Castro Urdiales platform of north Spain. The four phases (P1-P4; early Aptian, late earliest Albian, and early-late respectively) are identified across platform-to-basin transition on basis sedimentary geometries internal facies patterns. They vertically separated by incipient drowning events (D1-D4; middle Aptian-Albian boundary, Albian). first stage...
Abstract Palaeotemperature estimates from the oxygen‐isotope compositions of belemnites have been hampered by not knowing ancient seawater isotope well enough. We tackled this problem using Mg/Ca as a proxy for temperature and here, we present ~2 Ma record paired δ 18 O measurements Jurassic (Early Pliensbachian) Asturian basin palaeo‐proxy composition. From combined use two approaches, suggest w composition about −0.1‰ Jamesoni–Ibex zones. This value may increased 0.6‰ during Davoei Zone...