A5066047621- Geological and Geophysical Studies Worldwide
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University of the Basque Country
2013-2025
Autonomous University of Sinaloa
1996
Research Article| September 01, 2000 Superposed Hercynian and Cadomian orogenic cycles in the Ossa-Morena zone related areas of Iberian Massif L. Eguíluz; Eguíluz 1Departamento de Geodinámica, Universidad del País Vasco, Apartado 644, E-48080 Bilbao, Spain Search for other works by this author on: GSW Google Scholar J.I. Gil Ibarguchi; Ibarguchi 2Departamento Mineralogía y Petrología, Casilla Postal B. Ábalos; Ábalos 3Departamento A. Apraiz Author Article Information Publisher: Geological...
The Ossa-Morena Zone (SW Iberian Massif) hosts the largest set of Cambro–Ordovician alkaline magmatic plutons related to Palaeozoic rifting northern Gondwana margin so far described. An organized framework for their classification at different scales is proposed through data-driven ranks based on distinctive petrological features relative other rift-related rocks found throughout western Europe. method aims enhance geological mapping scales, regional- and continental-scale correlations, and,...
The major raw material documented in the archeological sites of Olduvai Gorge (Tanzania) is a geological with crystalline appearance, white or colorless, foliated seemingly massive only at outcrop scale, very high quartz-rich composition, and apparently metamorphic origin, named by us this paper: Crystalline Quartz-rich Raw Material (CQRM). Since early days research Gorge, long-lasting terminological imprecision has allowed defining confused way as quartz quartzite. Stubbornness reflects...
Abstract The Cambrian Series 2 Carbonate Formation from the Alter do Chão Elvas-Cumbres Mayores unit (Ossa-Morena Zone, SW Iberian Massif) is composed of regionally metamorphosed marbles and marlstones that underwent chlorite zone metamorphism preserve primaeval limestone 87 Sr/ 86 Sr ratios (0.7083–0.7088). These are consistent with established Lower seawater curve, therefore used for age constraints in formations lacking fossil contents. regional mineralogical Sr-isotopic features...