Results 131 to 140 of about 92,675 (274)
Continental‐Hemispheric Scale Dust Events Driven by Last Glacial Alpine Ice Sheet Dynamics
Geophysical Research Letters, Volume 52, Issue 13, 16 July 2025.Abstract Greenland ice cores demonstrate that transient last glacial cold climate events (stadials) were associated with greatly enhanced atmospheric dust loading. Detailed radiocarbon dating of loess in central Europe reveals concurrent increases in dust activity in dust‐emitting regions.
Yunus Baykal +7 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.Abstract Most of the global climate changes are closely associated with volcanic activity. However, the link between global cooling during the Ordovician‐Silurian (O‐S) transition and volcanism remains unclear due to limited constraints on large volcanic events before, during, and after the peak of the Hirnantian glaciation (PHG). Here, we present high‐
Weiliang Kong +4 more
wiley +1 more source
Shiyou shiyan dizhiIn recent years, exploration breakthroughs have been successively achieved in the strata deeper than the fifth member of the Lower Ordovician Majiagou Formation in the Ordos Basin, revealing its tremendous exploration potential.
Ping CHEN +6 more
doaj +1 more source
Search for, and study of, paleozoic impact ejecta: Progress made during the past year [PDF]
Nodule-like objects which the author believes to be impact bombs had been found in Middle Ordovician rocks of southeastern Wisconsin and northern Illinois.
Read, William F.
core +1 more source
III.—The Lower Ordovician Rocks of Scandinavia, with a Comparison of British and Scandinavian Tremadoc and Arenig Rocks [PDF]
, 1907 W Fearnsides
openalex +1 more source
The modular organization of the trilobite head in Ceraurus pleurexanthemus
Palaeontology, Volume 68, Issue 4, July/August 2025.Abstract The trilobite head is a complex structure composed of multiple fused segments which served several functions. Modelling the head as being constituted of modules, or subunits that vary semi‐independently from each other, can reveal underlying patterns of organization. Hypotheses of modular organization based on comparative developmental biology
Ernesto E. Vargas‐Parra +1 more
wiley +1 more source
“Stem-Ossicles” of Crinoidea, in the Leptæna-Kalk (Upper Ordovician) Dalecarlia Sweden [PDF]
, 1891 Gerhard Holm
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Devonian Sandstone Lithostratigraphy, Northern Arkansas [PDF]
, 1977 Two areas of Devonian sandstone development may be recognized in northern Arkansas. In northwestern Arkansas, the Clifty Formation comprises a massively bedded, super mature quartz arenite of Middle Devonian age overlain by thinner bedded, phosphatic ...
Hall, Jeffery D., Manger, Walter L.
core +2 more sources
Middle Darriwilian conodont zones in the uppermost San Juan limestone and the lower member of the Las Aguaditas formation, central Precordillera of San Juan, Argentina [PDF]
, 2013 The geological province of Precordillera is located in western Argentina. It extends 450 km meridionally and 110 km from east to west (Fig. 1) (Furque and Cuerda, 1979).
Albanesi, Guillermo Luis +2 more
core