Water column reoxygenation during the end-Permian mass extinction (EPME) is controversial

Redox proxies reveal large redox heterogeneity, with deep waters experiencing oxygenated conditions during the extinction interval

Both ocean reoxygenation and the development of ferruginous conditions contributed to the Lower Triassic pyrite framboid gap

Silver is enriched across the Volgian Isotopic Carbon Excursion (VOICE) in the Canadian Arctic

Other redox-sensitive trace elements do not exhibit spatially or temporally consistent patterns and indicate oxic conditions

Rifting in the proto-Amerasia Basin may have resulted in hydrothermal activity that caused the silver enrichment

Magnetic microscopy can be used to produce a 5× improvement in temporal resolution of magnetic records from speleothems

Variations in magnetic properties across speleothems can affect the temporal resolution of the magnetic record

Protocols for conducting high-resolution magnetic measurements of speleothems with magnetic microscopy are presented

Oriented rutile needles occur only in the pseudomorphs after augite forming the cores of garnet porphyroblasts in an eclogitized gabbro

The rutile needles extend through garnet into the coexisting other minerals; thus, they are not exsolutions from any of the host minerals

The texture of the rutile resembles shock lamellae in shocked quartz and zircon, suggesting that they formed in seismic shocked augite

Liquid droplet impacts are relevant to magma fragmentation processes in volcanology

Magma composition and ejection velocity are the main factors controlling pyroclast impact dynamics

Transitions between pyroclast splash and deposition can contribute to eruption style transitions and eruption dynamics

The geochemistry characteristics of the four samples suggest derivation from the subducted continental crust

The study revealed multi-stage magmatism associated with continental crust subduction and subsequent exhumation

Partial melting of subducted continental crust can promote the geochemical evolution of continental crust toward more felsic compositions

Marine fallout ash beds record cyclicity and acceleration of the Plio-Pleistocene (0–4 Myr) explosive Kamchatka-Kurile arc volcanism

Ash bed cyclicity correlates with the obliquity and precession variance of the global ice volume

Climate, and not direct orbital forcing, modulates the Plio-Pleistocene volcanicity of the Kamchatka-Kurile arc

Trace elements in primitive basalts from southwest North America suggest both asthenosphere- and lithosphere-related signatures

Open system interactions between ascending channelized melts and wallrock may affect the trace element composition of erupted basalts

1D transport models quantify the role of diffusion and wallrock assimilation to produce significant Nd isotopic shifts over 10 km of transport

A new paleopole reported from the late Jurassic sills and dykes positions the North China Block (NCB) at ∼37°N at ∼155 Ma

The NCB experienced a huge, steady southward shift of ∼4,000 km during ∼174–147 Ma, reflecting a component of true polar wander (TPW)

The plate shift of the NCB supports considerable TPW prior to ∼160 Ma, which is compatible with the ∼165–155 Ma aridification across East Asia