Michael A. Arthur

TL;DR: In this article, paired carbonate and organic-carbon isotope analyses from Nevada, USA, together with a consideration of the effects of mountain-building and ice-sheet coverage of the continents on atmospheric pCO2, lead to a new hypothesis for the cause of the Late Ordovician glaciation.

TL;DR: In this paper, the pyrite sulfur (Spy) and organic carbon (Corg) burial rates from recently improved Cenozoic stable isotope records were used to infer global changes in Corg burial environments.

TL;DR: Pore water chemistry (total dissolved CO 2, NH 4, NO 3, NO 2, PO 4, Si(OH) 4, Ca, Mg, Fe, Mn, SO 4, H 2 S and F, and titration alkalinity) and sediment characteristics (porosity, dry bulk density and formation factors) were determined on a centimeter-scale spacing in the upper 20-40 cm of sediments under intense upwelling areas on the Peru continental shelf as discussed by the authors.

TL;DR: In this paper, the authors presented a new orbital time scale for the Cenomanian-Turonian boundary (CTB) interval containing Oceanic Anoxic Event II (OAE II) vary by a factor of three.

TL;DR: In this article, stable isotope data from planktonic and benthic micro-fossils across the Cretaceous/Tertiary boundary in the North pacific was used to reveal a rapid and complete breakdown in this biologically mediated gradient.