Supplement to: Vuletich, April K; Threlkeld, Charles N; Claypool, George E (1989): Isotopic composition of gases and interstitial fluids in sediment of the Vøring Plateau, ODP Leg 104, Site 644. In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 281-283, https://doi.org/10.2973/odp.proc.sr.104.199.1989