Results 111 to 120 of about 43,556 (278)

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

open access: yesGeological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid   +9 more
wiley   +1 more source

Miocene to Quaternary Tectonostratigraphic Evolution of the Northern Section of the Burdur‐Fethiye Shear Zone, South‐Western Türkiye

open access: yesGeological Journal, EarlyView.
New zircon ages reveal that lacustrine sedimentation initiated in the Late Miocene (Messinian), revising earlier Pliocene age assignments. The study results support the interpretation of the northern BFSZ as a broad left‐lateral transtensional shear zone rather than a discrete sinistral fault or simple extensional graben array.
İrem Elitez   +3 more
wiley   +1 more source

Petrogenesis and Tectonic Setting of Late Mesozoic Felsic Magmatic Rocks in the Wangmushan Mining District, Northern Fujian, South China

open access: yesGeological Journal, EarlyView.
The rhyolitic ignimbrite and K‐feldspar granite porphyry from the Wangmushan mining district, northern Fujian yield ages of 173.8 ± 0.8 and 102.6 ± 0.4 Ma, respectively. Geochemical data, zircon trace elements, whole‐rock Sr–Nd–Pb isotope data, and zircon Hf isotopic compositions indicate that the rhyolitic ignimbrite originated from partial remelting ...
Wei Shaogang   +7 more
wiley   +1 more source

Review of the dental pattern in the squalomorph shark Protospinax annectans , and a description of two new Jurassic shark genera

open access: yesActa Palaeontologica Polonica
The extinct elasmobranch Protospinax is an intriguing shark known mostly from isolated teeth and rare complete skeletons. Most previous studies focused on differences in isolated teeth for taxonomic assignments, with little to no considerations of dental
Arnaud Begat   +5 more
doaj   +1 more source

Shell sizes of chemosymbiotic bivalves at late Mesozoic methane seeps.

open access: yes, 2014
Shell sizes of chemosymbiotic bivalves at late Mesozoic methane seeps.
Daniel Birgel (641373)   +10 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

Testing for Burden in a Macroevolutionary System

open access: yesJournal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
Evolutionary changes in the fundamental components of the bivalve body plan are not restricted to the early part of their evolutionary history. ABSTRACT The traits defining organismal body plans are expected to acquire burden, approaching invariance as they accumulate characters that depend on them, developmentally and functionally.
David Jablonski, Stewart M. Edie
wiley   +1 more source

Revision of Mesozoic decapod crustaceans from Madagascar

open access: yes, 2012
Charbonnier, Sylvain, Garassino, Alessandro, Pasini, Giovanni (2012): Revision of Mesozoic decapod crustaceans from Madagascar.
Charbonnier, Sylvain   +5 more
core   +1 more source

The rise and fall of a volcanic plateau: Landscape evolution at the fringes of the former Patagonian Ice Sheet, Meseta Chile Chico, central Patagonian Andes

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Understanding Earth‐surface processes along the fringes of large ice sheets is integral to deciphering cold‐region environmental variability and anticipating slope instability under climate change. We investigate the Meseta Chile Chico, a volcanic plateau in the central Patagonian Andes, located at the eastern margin of the former Patagonian ...
Carolina Franco   +8 more
wiley   +1 more source

Late Mesozoic bipolar bivalve faunas

open access: yes, 1986
Bipolar bivalve genera probably existed through the greater part of late Mesozoic (i.e. late Jurassic–late Cretaceous) time. Of the various theories put forward to account for their presence, those based on some form of global climatic zonation seem most
Crame, J.A., J. A. Crame
core   +1 more source

Home - About - Disclaimer - Privacy