Results 71 to 80 of about 1,509,261 (248)

SHRIMP ion probe zircon geochronology and Sr and Nd isotope geochemistry for southern Longwood Range and Bluff Peninsula intrusive rocks of Southland, New Zealand [PDF]

open access: yes, 2006
Permian–Jurassic ultramafic to felsic intrusive complexes at Bluff Peninsula and in the southern Longwood Range along the Southland coast represent a series of intraoceanic magmatic arcs with ages spanning a time interval of 110 m.y.
Ireland, Trevor R.   +7 more
core   +1 more source

Ichnology of the Rhätsandstein in the Exter Formation (Triassic), Germany

open access: yesGeological Journal, EarlyView.
Trace fossils from the Rhätsandstein of southern Germany record repeated colonization of high‐energy shallow‐marine substrates before the Triassic–Jurassic transition. The assemblage reflects environmental and preservational controls on ichnodiversity.
Daniel Sedorko, James H. Nebelsick
wiley   +1 more source

GINKGOPHYTES FROM THE UPPER PERMIAN OF THE BLETTERBACH GORGE (NORTHERN ITALY)

open access: yesRIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA, 2014
Fossil evidence of late Palaeozoic ginkgophytes is rare; Palaeozoic floras in which ginkgophytes are abundant or represent a predominant element have not previously been described. The late Permian (Lopingian) flora from the Gröden/Val Gardena Sandstone of the Bletterbach gorge in the Dolomites (northern Italy) contains an unusually large proportion of
Bauer, Kathleen   +5 more
openaire   +2 more sources

New geochronological constraints on Late Pleistocene glaciation in the southern Cadí Massif, SE Pyrenees

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT The Cadí Massif (42°17′09″ N, 1°38′11″ E; 2649 m a.s.l.) in the southeastern Pyrenees preserves clear evidence of Late Pleistocene glaciation, although previous research has focused almost exclusively on its northern slope. By contrast, the southern slope has remained largely unexplored.
M. Oliva   +5 more
wiley   +1 more source

Geochemical and granulometric fingerprints of 8200 years of westerly wind variability in inner‐fjord lake sediments from Svalbard

open access: yesBoreas, EarlyView.
The Arctic is warming faster than any other region on Earth. As sea ice diminishes, the surface boundary conditions, such as roughness and air–sea coupling, change and open‐water fetch increases. This may enhance wind forcing on Arctic coasts. Lake sediments can record these changes through the deposition of wind‐blown grains and elements, offering ...
Zofia Stachowska   +5 more
wiley   +1 more source

Appraisal of Six Natural Mica Reference Materials for In Situ Rb‐Sr Geochronology

open access: yesGeostandards and Geoanalytical Research, EarlyView.
Key Points Evaluated six natural mica reference materials for in situ LA‐ICP‐MS/MS Rb‐Sr geochronology using geochemical, microstructural and isotopic characterisation. Identified robust primary reference materials: Mount Dromedary biotite (99.37 Ma) and Mica‐Fe biotite (307.75 Ma). La Posta biotite and Högsbo muscovite are suitable secondary reference
Hugo K.H. Olierook   +38 more
wiley   +1 more source

New insects from the Permian of Catalonia (Spain) predate the early diversification of Triassic clades adapted to arid environments (Grylloblattodea, Probnidae, Dictyoptera) [PDF]

open access: yesFossil Record
Probnis sauvanyaensis sp. nov., the first representative of the ‘grylloblattodean’ family Probnidae from the Iberian Peninsula, is described from the middle to ?upper Permian outcrop of Sauvanyà in the Catalan Pyrenees.
Romain Garrouste   +5 more
doaj   +3 more sources

Protelytroptera From the Upper Permian of Australia, With aDiscussion of the Protocoleoptera and Paracoleoptera [PDF]

open access: yesPsyche: A Journal of Entomology, 1966
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +2 more sources

Possible Bipolar Global Expression of the P3 and P4 Glacial Events of Eastern Australia in the Northern Hemisphere: Marine Diamictites and Glendonites from the Middle to Upper Permian in Southern Verkhoyanie, Siberia [PDF]

open access: yes, 2022
Three intervals of glaciomarine diamictites with extensive glendonites in middle to upper Permian sediments were found in the Kobyume River, southern Verkhoyanie, Russia.
Davydov, V. I.
core  

Upper Carboniferous-Permian tectonics in Central Mediterranean: an updated revision [PDF]

open access: yes, 2020
An updated revision of the upper Carboniferous-Permian tectonics recorded in Corsica, Calabria and Tuscany is here proposed. We combine our and literature data to document how the sedimentary, tectono-metamorphic and magmatic upper Carboniferous-Permian ...
Ivan Zibra   +7 more
core   +1 more source

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