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In central east Greenland, on the Blosseville Coast to the east of Kangerdiugssuaq, late Cretaceous–early Tertiary sediments (here termed the Kangerdlugssuaq Group) underlie c. 9 km of Tertiary basalts (the Blosseville Group). The sediments appear to have been deposited in a shallow marine basin that was slightly displaced and then subsided rapidly as the dominantly submarine basalts of the Vandfaldsdalen and Mikis formations were erupted. Macro- and micro-fossils indicate that this basin was present by upper Albian times and persisted into the lower Sparnacian at which time the sediments were covered by the flood basalts. As these basalts must have preceded the separation of Greenland and Europe, it indicates that the age of magnetic anomaly 24 in the North Atlantic must be younger than its commonly accepted age and cannot be older than either 52 or 55 Ma., depending on the radiometric age of the upper Thanetian.
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