The iron sulfides constitute a diverse group of solids and dissolved complexes many of
which play key roles in marine systems. The group is particularly complex in the lower …

Marine Shales: Depositional Mechanisms and Environments of Ancient Deposits ADS
Classic is now deprecated. It will be completely retired in October 2019. This page will …

Existing redox classifications and the calibrations of elemental proxies to modern
environmental redox scales are in need of re-evaluation. Here, we review environmental …

Eight geochemical indices used for the interpretation of bottom water palaeo-oxygen
concentrations for argillaceous sedimentary rocks have been calculated for a suite of Upper …

The nine editions of Stable Isotope Geochemistry have appeared over a time span of nearly
50 years. The first edition (1973) appeared as a slim book of 135 pages. Due to the rapid …

Oceanic anoxia---including euxinic settings defined by the presence of water column
hydrogen sulfide (H~ 2~ S)---is minor in the ocean today. Such conditions, however, were …

The black shale submember of core shales of Pennsylvanian Kansas-type cyclothems is
highly enriched in redox-sensitive trace elements (TEs) relative to the overlying gray shale …

Analyses of 21 samples collected from a core of the 52.8-cm-thick Stark Shale Member of
the Dennis Limestone in Wabaunsee County, Kansas, demonstrate four cycles with two …

Mudstone is the most abundant sedimentary rock and variously acts as sources, seals, and
shale gas reservoirs in petroleum systems. Many important physicochemical properties of …

Pyrite framboids are densely packed, generally spherical aggregates of submicron-sized
pyrite crystals. In this study, a survey was made of framboid size distributions in recently …