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Venginian

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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2430(29)
..., Aptian), and 58.7 ± 2.4 Ma (Paleocene); and potassic magmatism at 138.9 ± 0.7 (Early Cretaceous, Venginian) and 126.4 ± 0.4 Ma (Early Cretaceous, Barremian). The main geochemical characteristics of the sodic alkaline rock types are systematic Nb-Ta positive anomalies and Sr-Nd isotopes trending...