title: Marine dolomite of unusual isotopic composition.
abstract: A piston core taken off of the coast of Oregon in 358 meters of water contained an indurated calcareous layer composed partly of dolomite with a composition Ca(58.7)Mg(41.3). Dolomites of this chemical composition are typical of the supratidal environment. However, the dolomite has isotopic composition delta0(18) = 5.8 per mille, deltaC(13) = 35.1 per mille relative to the Chicago PDB-I standard. The unusual carbon isotope ratio is similar to that of calcites produced as a byproduct of bacterial breakdown of hydrocarbons.
authors.forename: K L
authors.initials: KL
authors.lastname: Russell
authors.forename: K S
authors.initials: KS
authors.lastname: Deffeyes
authors.forename: G A
authors.initials: GA
authors.lastname: Fowler
authors.forename: R M
authors.initials: RM
authors.lastname: Lloyd