The order Heterocorallia is an enigmatic, anatomically distinct group of calcifying Palaeozoic corals with unclear affinities to other, either extinct or modern cnidarian lineages. Here, we present results microstructure and stable isotope studies on exceptionally well-preserved skeletons two species the heterocoral Oligophylloides from Famennian (Upper Devonian) Anti-Atlas, Morocco Holy Cross ...

Abstract The Iberian Pyrite Belt is a world-class metallogenic district developed at the Devonian-Carboniferous boundary Variscides that currently has seven active mines: Neves Corvo (Cu-Zn-Sn) and Aljustrel (Cu-Zn) in Portugal, Riotinto (Cu), Las Cruces Aguas Teñidas (Cu-Zn-Pb), Sotiel-Coronada La Magdalena (Cu-Zn-Pb) Spain. massive sulfide ores are usually hosted lower sections of volcano-sed...

Issues related to the influence of reservoir properties uncertainty on oil field development modelling are considered. To increase reliability geological-hydrodynamic mathematical model in course multivariate matching, design technological parameters was estimated, and their mutual determined. The optimal conditions for deposit were determined, forecasts made. described approach history matchin...

Abstract. In the Late Devonian to earliest Mississippian, Svalbard was affected by a short-lived episode of deformation named Svalbardian Orogeny. This event resulted in intense folding and thrusting sedimentary successions. Deformation stopped prior deposition Carboniferous Permian strata Billefjorden Gipsdalen groups, which lie unconformably over folded strata. Later on, presumed structures w...

The Geirud Formation consists mainly of clastic sediments which are interbedded with limestone stringers. This rock unit is well-exposed along the Central Alborz Range in northern Iran. The Geirud Formation rests unconformably on the Mila Formation (Upper Cambrian) and is conformably overlain by the Mobarak Formation (Lower Carboniferous). This study was undertaken to determine the geologi...