Strontium and rubidium concentrations of ODP Site 104-642 (Table 1)@en
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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. […]
创建时间：
2026-04-14
