Joel S Leventhal

• Carbon-sulfur plots and degree of pyritization determinations to show diagenetic and epigenetic sulfidation in Creede caldera cores
• Modern mobile methane measurements in marshes
• Organic geochemical studies to understand ore genesis at Creede
• Preliminary results from microanalyses of organic matter in the lower Proterozoic uranium ores at Oklo in Gabon
• Relative importance of organic carbon and sulfide sulfur in a Wyoming roll-type uranium deposit
• Soil organic carbon content in rice soils of Arkansas and Louisiana and a comparison to non-agricultural soils, including a bibliography for agricultural soil carbon