Refractory megacrysts of olivine, plagioclase, chromian diopside and Cr-Al spinel, which were not in equilibrium with the host oceanic tholeiite on eruption, are present in samples from several dredge
The data archive includes compositional and geographic data for geologic samples from the Alca obsidian source in the Peruvian Andes. Compositional data for geologic samples from six other Peruvian ob
We present new mineral magnetic data to analyse the relationship between χ ARM (anhysteretic remanent magnetization susceptibility) versus χ fd (frequency-dependent magnetic suscep
The Permian-Triassic mass extinction (PTME) was one of the transformative events of the Phanerozoic, marked by extinction, post-Permian transformation of surviving ecosystems, and the formation of new
