Results 91 to 100 of about 42,593 (264)

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

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

Environmental Contaminant Accumulation in Freshwater Turtles Inhabiting Three Rivers of the Permian Basin, New Mexico, USA

open access: yesEnvironmental Toxicology, EarlyView.
ABSTRACT Freshwater turtles are valuable sentinels of aquatic systems due to their long lifespans and resilience in environments impacted by contaminants. The Permian Basin, dominated by the oil and gas sector, spans western Texas and southeastern New Mexico, USA, including the Pecos River and its tributaries, the Delaware and Black Rivers.
Ana G. G. Sapp   +4 more
wiley   +1 more source

Talc‐Tempered Pottery From Bala Hissar, Kabul: An Analytical Study

open access: yesArchaeometry, EarlyView.
ABSTRACT Potsherds of cooking ware excavated at Bala Hissar archaeological site in Kabul were studied using X‐ray fluorescence (XRF), scanning electron microscope‐energy dispersive X‐ray spectrometry (SEM‐EDS), Raman spectroscopy, X‐ray powder diffraction (XRPD), thermogravimetric analysis (TGA) and optical microscopy.
Parviz Holakooei   +4 more
wiley   +1 more source

Permian

open access: yes
The Permian System in the Netherlands is subdivided into the Lower Rotliegend, Upper Rotliegend and Zechstein groups. These groups were deposited in a large epicontinental basin extending from the UK to Poland. The Lower Rotliegend Group, deposited during the early Permian, unconformably overlays older strata (at the Base Permian Unconformity), is ...
Bouroullec, R., Geel, C.R., Geluk, M.C.
openaire   +2 more sources

Morphometric analysis of cirques in central Siberia's western Putorana Plateau: a proxy for palaeoclimate

open access: yesBoreas, EarlyView.
A detailed morphometric analysis of 200 cirques across the western Putorana Plateau, central Siberia, was undertaken to investigate cirque development, reconstruct glaciers and infer palaeoclimatic conditions. Cirques are amphitheatre‐shaped landforms with mean length and widths of 936 and 1000 m, respectively, indicating a mature glacial landscape ...
Rachel P. Oien, Ethan Lee
wiley   +1 more source

Complex examination of the Upper Paleozoic siliciclastic rocks from southern Transdanubia, SW Hungary—Mineralogical, petrographic, and geochemical study [PDF]

open access: yes, 2007
A vertical section of Upper Paleozoic sandstones from southern Transdanubia (Mecsek-Villány area, Tisza mega-unit, Hungary) has been analyzed for major and trace elements, including rare earth elements (REEs).
Nesbitt   +34 more
core   +1 more source

Larval character evolution in Holometabola (Insecta)

open access: yesCladistics, EarlyView.
Abstract Larvae, a novel type of immature stage, are a crucial innovation of the Holometabola. Larval features therefore provide key evidence for reconstructing evolutionary transformations in this megadiverse group. Here we present the first formal reconstruction of larval character evolution, using maximum parsimony and Bayesian ancestral‐state ...
Rolf Georg Beutel, Jakub Goczał, Di Li
wiley   +1 more source

Permian-Triassic brachiopod fauna and the end-Permian mass extinction

open access: yes, 2014
Permian-Triassic brachiopod fauna and the end-Permian mass ...
Y Zhang (5998940)
core  

Permian climate change recorded in palynomorph assemblages of Mozambique (Moatize Basin, eastern Tete Province) [PDF]

open access: yes, 2017
Knowledge of Late Permian biodiversity patterns, following the end-Guadalupian crisis, is still in its infancy, since most recent studies have focused on the end-Permian biotic crisis.
Lloyd, Andrew W   +8 more
core   +1 more source

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