Figure 6: K-Ar geochronology of deeply weathered basement in southwestern Scandinavia. | Nature Communications

Figure 6: K-Ar geochronology of deeply weathered basement in southwestern Scandinavia.

From: The inheritance of a Mesozoic landscape in western Scandinavia

Figure 6

(a) Illite K-Ar age (Ma) versus grain size (μm) spectra for the analyzed samples from Ivö, Bomlø and Utsira High. Only the finest grain size fractions are interpreted as representing authigenic illite and are used to infer the age of saprolitization. Error bars are ±2σ. (b) Schematic geological profile along an E–W cross-section across southern Norway and part of the Norwegian Sea53 (see Fig. 1 for profile location) with the new apparent saprolitization ages. We suggest that the deeply weathered landscapes at Utsira High and Bømlo both formed in the Late Triassic.

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