A5082396976- Paleontology and Stratigraphy of Fossils
- Calcium Carbonate Crystallization and Inhibition
- Geological and Geophysical Studies Worldwide
- Coral and Marine Ecosystems Studies
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Geological formations and processes
- Ichthyology and Marine Biology
- Cephalopods and Marine Biology
- Archaeological and Geological Studies
- Radioactive element chemistry and processing
- Geological and Geophysical Studies
- Laser-induced spectroscopy and plasma
- Marine Bivalve and Aquaculture Studies
- Geochemistry and Geologic Mapping
- Geochemistry and Elemental Analysis
- earthquake and tectonic studies
- Paleontology and Evolutionary Biology
- Geological and Tectonic Studies in Latin America
- Methane Hydrates and Related Phenomena
- Environmental and Cultural Studies in Latin America and Beyond
- Geotourism and Geoheritage Conservation
- Historical Studies on Spain
- Karst Systems and Hydrogeology
- Chemical and Environmental Engineering Research
Universidad de León
2020-2024
Universidad de León
2022-2023
Universidad Complutense de Madrid
2009-2020
Institute of Paleobiology
2017-2020
Polish Academy of Sciences
2019
Instituto de Geociencias
2013
Paleoclimate studies play a crucial role in understanding past and future climates their environmental impacts. Current methodologies for performing highly sensitive elemental analysis at micrometre spatial resolutions are restricted to the use of complex and/or not easily applied techniques, such as synchrotron radiation X-ray fluorescence micro-analysis (μ-SRXRF), nano secondary ion mass spectrometry (nano-SIMS) or laser ablation inductively coupled plasma (LA-ICP-MS). Moreover, large...
Abstract Distinguishing between environmental and species-specific physiological signals, recorded in coral skeletons, is one of the fundamental challenges their reliable use as (paleo)climate proxies. To date, characteristic biological bias skeleton-recorded signatures (vital effect) was shown shifts geochemical signatures. Herein, for first time, we have assessed crystallographic parameters bio-aragonite to study response reef-building Stylophora pistillata experimental seawater...
One of the most conserved traits in evolution biomineralizing organisms is taxon-specific selection skeletal minerals. All modern scleractinian corals are thought to produce skeletons exclusively calcium-carbonate polymorph aragonite. Despite strong fluctuations ocean chemistry (notably Mg/Ca ratio), this feature believed be throughout coral fossil record, spanning more than 240 million years. Only one example, Cretaceous Coelosmilia (ca. 70 65 Ma), have produced a calcitic skeleton. Here,...
Different non-classical crystallization mechanisms have been invoked to explain structural and compositional properties of biocrystals. The identification precursor amorphous nanoparticle aggregation as an onset process in the formation numerous biominerals (crystallization via particle attachment) constituted a most important breakthrough for understanding biologically mediated mineralization. A comprehensive about how attached particles transform into more stable, crystalline grains has...
The biological mediation of mineral formation (biomineralization) is realized through diverse organic macromolecules that guide this process in a spatial and temporal manner. Although the role these molecules biomineralization being gradually revealed, molecular basis their regulatory function still poorly understood. In study, incorporation distribution model intrinsically disordered starmaker-like (Stm-l) protein, which active fish otoliths biomineralization, within calcium carbonate...
Abstract The crystallographic orientation of structural elements in skeletons representatives C arboniferous S yringoporicae ( A uloporida) has been analysed by scanning electron microscopy SEM ), petrographic and backscatter diffraction EBSD ) on specimens from the I berian P eninsula. tabulate corals consist biogenic calcite crystals, their microstructure is composed lamellae, fibres granules, or a combination these. Independent microstructure, c ‐axis oriented towards lumen,...
Otoliths are calcium carbonate components of the stato-acoustical organ responsible for hearing and maintenance body balance in teleost fish. During their formation, control over, e.g., morphology polymorph is influenced by complex insoluble collagen-like protein soluble non-collagenous assemblages; many these proteins incorporated into aragonite crystal structure. However, fossil record considered lost through diagenetic processes, hampering studies past biomineralization mechanisms. Here...
Abstract In contrast to abiotically formed carbonates, biogenetic carbonates have been observed be nanocomposite, organo-mineral structures, the basic build-blocks of which are particles quasi-uniform size (10–100 nm) organized into complex higher-order hierarchical typically with highly controlled crystal-axis alignments. Some these characteristics serve as criteria for inferring a biological origin and state preservation fossil carbonate materials, determine whether biomineralization...
Abstract The taxonomic assignation and ecological implications of the genus Syringoalcyon Termier & Termier, 1945 have been a palaeontological problem for long time. Carboniferous material from Morocco Spain has studied using biomineralogical approach by means petrographic microscopy, SEM , AFM EMPA CIP microscopy analysis. Detailed morphological, structural, chemical composition crystallographic data enable deeper understanding nature . coral walls so‐called epithecal scales exhibit...
Abstract Late Mississippian carbonates in southern Montagne Noire are dominantly domical to laterally‐accreted microbial mounds some formations, as well stratiform limestones occurring hundreds of olistoliths within a flysch basin, constituting pieces giant puzzle that used help reconstruct platform region is no longer preserved. Petrographic data limestone samples from 14 continuous long sections have been analyzed statistically, using multivariate clustering (Q‐mode) the...
Abstract A new foraminiferal subzone (Cf5α or MFZ12α) in between the classical zonal biozones is characterized by first occurrence of Archaediscus at concavus stage, primitive species Pojarkovella , as well Endothyranopsis s.s. This interval represented England, France and Morocco (in western Palaeotethys) South China, more widely Iran eastern Palaeotethys), where it partly similar to MFZ11B defined previous authors. The position this biozone within Livian Holkerian substages suggests that...
The Serpukhovian coral assemblages from Idmarrach and Tirhela formations (Adarouch, Morocco) have been studied. They yielded quite diverse with a total of 32 rugose 1 tabulate species. distribution corals in the sections 1, 2, 3, 4 2 has established, which include Bashkirian rocks. are composed mostly species that their higher abundance upper Viséan. However, most recorded taxa Adarouch already mentioned rocks Britain, Moscow Basin, Urals, Donets Basin other North African regions such as...
The degree to which emergent surfaces are correlated in late Asbian carbonate successions Britain and Ireland is assessed by the integration of detailed biostratigraphy diversity trends foraminifers. Data related Trowbarrow Quarry section northern England, provides a reference for upper because its rich assemblages high sampling density. Diversity shown be non-random, possess cyclic behaviour, can quantitatively between sections. allow stratigraphic segmentation into 13 intervals...
Foraminiferal studies in carbonate platforms from China during the Mississippian are scarce compared to other regions Europe, North Africa, and America.There only some classical biostratigraphical based on foraminifers, with zonal schemes summarized Lin et al. (1990), Hou Jin (2000).However, foraminiferal zones defined these publications as well those authors of (e.g.Ye 1987), long-ranging or local species, thus, they difficult correlate international biozones for Viséan Serpukhovian (Sheng...
Computer-integrated polarisation (CIP) method has been applied satisfactorily in the study of fossils skeletons Sinopora (tabulate coral, Auloporida and Carboniferous). A previous characterisation sample by scanning electron microscopy, atomic force microscopy cathodoluminescence (CL) with purpose distinguishing diagenetical alteration was done. Subsequently, a crystallographic comparison between CIP electron-backscattering diffraction made getting very good correlation both methods. The...
The coral content of the Viséan rocks from Guadiato Area (SW Spain) have been studied during last 25 year. Part assemblages previously described, but never as whole. 69 recorded species belonging to Rugosa, Tabulata and Heterocorallia are illustrated. family Antiphyllidae is represented by two genera three species; Laccophyllidae, Plerophyllidae Polycoeliidae one Cyathaxoniidae genus Amplexidae Zaphrenotididae Cyathopsidae four five Bothrophyllidae Aulophyllidae nine ten Palaeosmiliidae...
Abstract The Viséan–Serpukhovian boundary is poorly defined in South China, hampering regional and global stratigraphical correlations. foraminiferal conodont distribution of the Baping Formation carbonate-slope Danlu section permits recognition an interval from middle Viséan to uppermost Serpukhovian a continuous succession. base recognized by first occurrences Janischewskina delicata , Howchinia subplana questionable ‘ Millerella ’ tortula . At slightly younger level, Lochriea ziegleri...
Auloporid corals are common in the Palaeozoic and very frequent Carboniferous buildups of Iberian Peninsula. The aim this study is to analyze diversity these through a taxonomical recognition species morphotypes that occur Eighteen sections have been sampled between Ossa-Morena (Mississippian) Cantabrian (Pennsylvanian) zones dated as upper Viséan early Kasimovian. In addition, other localities where auloporids cited literature also used for study. identification has carried out using...