The Valdediezma platform consists of upper Tournaisian to lower Bashkirian (Carboniferous) shallow-water carbonates deposited in the core Picos de Europa Province (Cantabrian Mountains, northwest Spain). Although faulted several thrust sheets, it is only preserved developed Mississippian starved basins southern branch Variscan Orogen that characterised also by pelagic sedimentation. This unusua...

The early Tournaisian (Carboniferous) stage represents a key episode in the evolution of vertebrates. It follows end-Devonian Hangenberg extinction event, which led to major perturbation both terrestrial and aquatic vertebrate ecosystems, resulted significant restructuring assemblages. However, few faunal associations this age have been described, our understanding turnover across Devonian-Carb...

The lack of fossil tetrapod bearing deposits in the earliest Carboniferous ('Romer's Gap') has provoked some recent discussions regarding the proximal cause, with three explanations being offered: environmental, taphonomic, and collection failure. One of the few, and earliest, windows into this time is the locality of Blue Beach exposed in the Tournaisian deposits at Horton Bluff lying along th...

Abstract The Drewer quarry located in the Rhenish Massif is a well-studied outcrop that comprises Upper Devonian (Famennian) to Lower Carboniferous (Viséan) strata. Within deposits two black shale intervals have been described are linked global oceanic anoxic events, Hangenberg Event and Alum Shale Event. shales associated with Middle Tournaisian contain abundant phosphatic concretions, which w...

Abstract The recently discovered massive and stockwork sulphide mineralization of Semblana-Rosa Magra Monte Branco, situated ESE the Neves–Corvo volcanogenic (VMS) deposit in Iberian Pyrite Belt (IPB) is presented. Geological setting tectonic model discussed based on proxies such as palynostratigraphy U–Pb zircon geochronology. found within IPB Volcano-Sedimentary Complex (VSC) Lower sequence, ...

Premise of research. Periderm is a protective secondary tissue that replaces the epidermis in stems and roots having growth. The first periderm most commonly originates immediately below epidermis, but some species, it arises deeper stem, usually primary phloem. common feature extant plants has been reported numerous fossil taxa. Here we investigate presence this Carboniferous representative cl...

Various genetic and morphological types of voids in carbonate reservoirs make it difficult to diagnose them, which can be seen the determination reservoir properties northern marginal shear zone Caspian Syneclise. A macro- microscopic study rocks was carried out by staining carbonates thin sections with alizarin (determination mineral composition, structure, texture, void fracture spaces, rock ...

This paper present new U–Pb geochronological data (LA-ICP MS on zircon) of granitoids from the Moroccan Meseta Variscan belt. Zircons Oulad Ouaslam granodiorite in Jebilet massif Western highlight a peak magmatic activity at 335.2 ± 0.8 Ma. In Eastern Meseta, ages obtained several facies High Moulouya complex restrained its to early Visean: 339.6 1.9 Ma for Perdreaux granite, 337 1.6 calc-alkal...