Results 41 to 50 of about 17,177 (230)

Deglaciation of the Burren glacio‐karst, western Ireland, during Termination 1: Implications for North Atlantic climate and karstification

Journal of Quaternary Science, EarlyView.
Abstract The Burren uplands in western Ireland form one of the most extensive and best‐preserved examples of glacio‐karst in Europe. Subsumed by the Irish ice sheet during the Late Pleistocene, granite erratic boulders and in situ silica veins in the limestone bedrock provide a rare opportunity to reconstruct the timing and rate of deglaciation ...
Gordon Bromley, Colin Bunce, Brenda Hall, Aaron Putnam, Frank McDermott   +4 more
wiley   +1 more source

The Material Basis of 18th‐Century Meissen Porcelain

Archaeometry, EarlyView.
ABSTRACT In the summer of 1708, the quest for making hard‐paste porcelain from Saxonian clay and other mineral resources succeeded. This was achieved by applying as its essential ingredient newly discovered pure kaolin from Heidelsberg near Aue, western Saxon Ore Mountains.
Robert B. Heimann
wiley   +1 more source

Constraining the Timing of Evolution of Shear Zones in Two Collisional Orogens: Fusing Structural Geology and Geochronology

Geosciences, 2022
In recent decades, constraining the timing of shear activity has been one of the main topics of research about the tectono-metamorphic evolution of orogenic belts.
Rodolfo Carosi, Chiara Montomoli, Salvatore Iaccarino, Beatriz Benetti, Alessandro Petroccia, Matteo Simonetti   +5 more
doaj   +1 more source

Jadeite in Continental Subduction: Its Preservation, Breakdown and Pseudomorphic Replacement in Erzgebirge UHP Gneisses

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The absence of jadeite in regions where subduction of continental crust has been documented by other high‐pressure (HP) or ultrahigh‐pressure (UHP) minerals is striking. This study presents only the second discovery of jadeite in the crystalline rocks of the Erzgebirge, a region known for its occurrences of microdiamond, coesite and omphacite ...
Ondrej Lexa, Martin Racek, Petr Jeřábek, Benjamin Paddon   +3 more
wiley   +1 more source

Effects of inherited structures on inversion tectonics: Examples from the Asturian Basin (NW Iberian Peninsula) interpreted in a Computer Assisted Virtual Environment (CAVE) [PDF]

, 2018
Map shows mid-nineteenth century Texas counties, major cities, towns, roads, railroads, and areas of Native American habitation. Includes detailed notes on map.
Hodei Uzkeda, Josep Poblet, Mayte Bulnes, Santiago Martín, Alonso, Alonso, Alonso, Alonso, Bádenas, Beroiz, Beroiz, Beroiz, Carrivick, Cawood, Corsini, Erslev, Fonstad, García-Ramos, García-Ramos, García-Ramos, García-Ramos, Gervilla, Gervilla, Julivert, Julivert, Lepvrier, Lockley, Martín, Menéndez Casares, Odriozola, Pello, Pignatelli, Pignatelli, Poblet, Poblet, Poblet, Pulgar, Riaza Molina, Rodríguez Fernández, Soler, Suárez Rodríguez, Suárez-Ruiz, Suárez Vega, Suppe, Triggs, Uzkeda, Uzkeda, Uzkeda, Uzkeda, Valenzuela, Valenzuela, Wu, Wu   +52 more
core   +3 more sources

The East Variscan Shear Zone (EVSZ) and Its Regional Mylonitic Complex: A New Geodynamic Interpretation of the Variscan Axial Zone in Sardinia (Italy)?

Geosciences
Sardinia (Italy) represents one of the most comprehensive cross-sections of the Variscan orogen. The metamorphic and structural complexity characterizing its axial zone still presents many unresolved issues in the current state of knowledge.
Federico Mantovani, Franco Marco Elter
doaj   +1 more source

Variscan-late Variscan-early Alpine progressive extensional collapse of central Spain

Geodinamica Acta, 1994
AbstractThe Variscan—late Variscan—early Alpine evolution of Central Spain is characterized by a progressive transition from dominant compressional conditions, towards a generalized extensional regime. This evolution involved four tectonomag-matic stages: 1) a Dl Variscan stage, associated to widespread compression with E-vergent structural elements ...
Miguel Doblas, Roberto Oyarzun, Alfonso SopeÑ, José LÓpez Ruiz, Ramón Capote, Jose Luis HernÁndez Enrile, Manuel Hoyos, Rosario Lunar, Yolanda SÁnchez Moya   +8 more
openaire   +1 more source

Niemcza diorites and moznodiorites (Sudetes, SW Poland): a record of changing geotectonic setting at ca. 340 Ma [PDF]

, 2013
Granites sensu lato in the Sudetes intruded in several episodes during the Variscan orogeny recording different stages of crust and mantle evolution.
Kierczak, Jakub, Pietranik, Anna, Storey, Craig   +2 more
core   +1 more source

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

Meteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska, S. Alwmark, C. Alwmark, M. H. Poelchau, P. Lambert   +4 more
wiley   +1 more source

Geology of giant quartz veins and their host rocks from the Eastern Pyrenees (Southwest Europe)

Journal of Maps, 2023
Giant Quartz Veins (GQVs) are ubiquitous in different tectonic settings and, besides being often related to hydrothermal ore deposits, also represent large-scale fingerprints of the structural and geochemical history of the rocks in which they are hosted.
Eloi González-Esvertit, Àngels Canals, Paul D. Bons, Henrique Murta, Josep Maria Casas, Enrique Gomez-Rivas   +5 more
doaj   +1 more source