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Swiss Journal of Geosciences

Table 2 Results of the K–Ar dating on glauconite grains from the Marnes d’Uttins and from a glauconite layer near the base of the Urgonien Jaune in the Eclépens quarry

From: Reconciling strontium-isotope and K–Ar ages with biostratigraphy: the case of the Urgonian platform, Early Cretaceous of the Jura Mountains, Western Switzerland

Samples

K2O (%)

Ar* (%)

Age (Ma)

Error (Ma)

ECn21

6.47

97.36

127.5

±2.3

ECn57

6.03

95.18

130.7

±2.6

  1. Ar* refers to radiogenic Argon
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