Strontium and rubidium concentrations of ODP Site 104-642 (Table 1), supplement to: Smalley, P Craig; Qvale, G; Qvale, H (1989): Some ages from Leg 104 Site 642 obtained by Rb-Sr glauconite dating and Sr isotope stratigraphy. 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, 249-253

P Craig Smalley, G Qvale & H Qvale
We have attempted to date several samples from Site 642 using a combination of Sr isotope stratigraphy and Rb-Sr dating of glauconite. A carbonate shell fragment from Sample 104-642B-22H-6, 70-73 cm gives a Sr isotope stratigraphy date of 17.3 +/- 1.0 Ma, which agrees well with available biostratigraphic and paleomagnetic data. Glauconites from a nearby sample (104-642B-23H-1, 66-69 cm) give a similar date.One carbonate shell fragment and two fish teeth samples from Core 104-642D-12X give...
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