Organic geochemistry of Cretaceous black shales, supplement to: Dunham, Keith W; Meyers, Philip A; Ho, Eileen S (1988): Organic geochemistry of Cretaceous black shales and adjacent strata from the Galicia margin, North Atlantic Ocean. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 557-565

Keith W Dunham, Philip A Meyers & Eileen S Ho
Organic-carbon-rich 'black shales' and adjacent organic-carbon-poor rocks from three different Cretaceous settings encountered during ODP Leg 103 have been studied by organic geochemical methods. Rock-Eval analysis, carbon isotope data, and lipid biomarkers show organic matter to contain varying proportions of marine and continental materials. In Hauterivian-Barremian organic-carbon-rich marlstone turbidites, large amounts of land-derived organic matter are found. Aptian-Albian black-colored shales are interspersed within green claystones, from which they differ by containing more marine organic matter....
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