Results 241 to 250 of about 924,508 (327)

Formation of breccia pipes associated with a hydrogen-rich hydrothermal system on the east Caroline plate in the West Pacific. [PDF]

open access: yesSci Adv
Xiao Y   +13 more
europepmc   +1 more source

Localized and Transient Oxygenation of Shallow Oceans of Southwestern Laurentia at the Ediacaran–Cambrian Boundary

open access: yesGeobiology, Volume 24, Issue 1, January/February 2026.
ABSTRACT The Ediacaran–Cambrian boundary, which precedes one of the most significant biotic diversification events in Earth's history, is associated with a global negative carbon isotope excursion termed the BAsal Cambrian carbon isotope Excursion (BACE).
Watsawan Chanchai   +6 more
wiley   +1 more source

A geological carbon cycle sink hosted by ocean crust talus breccias. [PDF]

open access: yesNat Geosci
Coggon RM   +17 more
europepmc   +1 more source

Spatiotemporal Diversification of Forest Understorey Species Reveals the Existence of Multiple Pleistocene Forest Refugia in Central Europe

open access: yesMolecular Ecology, Volume 35, Issue 1, January 2026.
ABSTRACT During Pleistocene cold stages, European temperate forests were not only restricted to refugia in the southern European peninsulas. Rather, there is increasing evidence for the survival of trees also in isolated patches further north, termed ‘northern refugia’.
Camille Voisin   +8 more
wiley   +1 more source

Aligned hydrothermal fluid‐flow pathways in Middle Permian near‐shore marine sediments beneath a basaltic lava flow

open access: yesSedimentology, Volume 73, Issue 1, Page 83-102, January 2026.
ABSTRACT Tubular and curviplanar structures, outlined by the occurrence of haematite/goethite, chlorite, quartz and albite, are developed in the Middle Permian Broughton Formation in the southern Sydney Basin, New South Wales, Australia. These structures are interpreted as fluid‐flow pathways resulting from the ejection of heated pore fluids as a thick
Paul F. Carr   +5 more
wiley   +1 more source

Beyond Oxygen Fugacity: A Compositional Metric to Probe Earth's Redox Structure

open access: yesGeophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract We quantify the redox capacity (dO2) by redox titration—defined as the quantity of oxygen required to fully oxidize a sample—for rocks spanning Earth's upper mantle to surface sediments. The values span three orders of magnitude, with the greatest variability in metamorphic and surface rocks that host both highly reduced (rich in carbon and ...
Matthieu Emmanuel Galvez   +2 more
wiley   +1 more source

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