Results 61 to 70 of about 3,529 (187)
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.Abstract This study integrates new zircon U–Pb ages, zircon εHf(t)–δ18O isotopic data, and whole‐rock geochemistry to refine the temporal and spatial framework of magmatism in the southern Northern Andes (SNA) from ∼65 to 6 Ma. The San Lucas, Catamayo, Portachuela, and Gonzanamá batholiths and magmatic suites, along with Late Miocene plutons, display ...
J. Iglesias +14 more
wiley +1 more source
Paleoceanography and Paleoclimatology, Volume 41, Issue 8, August 2026.Abstract The Rio Grande Rise (RGR) is a major submarine feature in the South Atlantic that plays an important role in regional oceanographic dynamics. This study presents new U‐Pb geochronology of sedimentary rocks from the RGR, offering direct age constraints on carbonate and apatite embedded within Fe‐Mn crusts and associated foraminifera fossils ...
Giovanna Orletti Del Rey +8 more
wiley +1 more source
PLoS ONE, 2014 Plant and associated insect-damage diversity in the western U.S.A. decreased significantly at the Cretaceous-Paleogene (K-Pg) boundary and remained low until the late Paleocene. However, the Mexican Hat locality (ca.
Michael P Donovan +4 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.Abstract The Cenozoic topographic growth of the Iranian Plateau, situated at the Arabia‐Eurasia collision front, provides insights into continental collision dynamics. However, the relative contributions of tectonic shortening versus deep mantle processes to crustal thickening remain debated because systematic quantitative constraints on paleo‐crustal ...
Jun Hu +4 more
wiley +1 more source
Acta Palaeobotanica, 2014 Morphology and anatomy of the extinct angiosperm fruit, Porosia verrucosa (Lesqueruex) Hickey, are documented in detail based on various modes of preservation including molds, casts, and permineralizations from more than seventy localities in the late ...
Manchester Steven R., Kodrul Tatyana M.
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Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.Abstract The kinematics and progressive evolution of Riedel shear zones have been extensively studied, yet the factors controlling their distinct evolutionary styles in natural settings remain debated. Understanding such fracture network architecture has great implications, such as predicting subsurface fluid flow and assessing seismic hazards.
Jiajun Chen +7 more
wiley +1 more source
Tectonics, Volume 45, Issue 8, August 2026.Abstract The Sangre de Cristo Range in southern Colorado records a complex tectonic history that includes Late Cretaceous–Eocene Laramide contraction and Oligocene–Quaternary Rio Grande rift extension. We present new thermochronologic data (40Ar/39Ar, fission‐track, (U‐Th)/He) and thermal history models that provide insight into this polyphase history ...
John Singleton +10 more
wiley +1 more source
UPPER CRETACEOUS AND PALEOCENE IN ZANSKAR RANGE (NW Himalaya)
Rivista Italiana di Paleontologia e Stratigrafia, 2020 A detailed Upper Cretaceous/Paleocene stratigraphic section was measured from the Spanboth Chu Valley, High Himalaya Nappes. Placement Of the Cretaceous—Tertiary boundary was refined, but some uncertitudes still remain because of poor exposure in this ...
MAURIZIO GAETANI +5 more
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Journal of Anatomy, Volume 249, Issue 2, Page 314-337, August 2026.Fossil finds from three Middle Miocene sites in Poland reveal the northernmost known presence of trionychid turtles in Europe, tentatively identified as Trionyx cf. vindobonensis, suggesting a warmer climate that supported thermophilic species in Central Europe during this period. Abstract Modern trionychids (Testudines, Cryptodira) have a pan‐tropical
Yohan Pochat‐Cottilloux +5 more
wiley +1 more source
Diversification of Paleocene Plantic Foraminifera after the Cretaceous-Paleocene Extinction [PDF]
The Paleontological Society Special Publications, 1996 Richard D. Norris, W.A. Berggren
openaire +1 more source