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Ichnological analysis of two Cretaceous–Paleogene boundary sections at Bidart (SE France) and Sopelana (N Spain) has been conducted in order to refining eco-sedimentary environment, and to a make comparison with previous interpretations based on microfossils. In both sections, trace fossil assemblage is low diverse, consisting of Chondrites, Planolites, Thalassinoides, Trichichnus, Zoophycos, and...
The larger foraminifer turnover (LFT), which marks the base of the Ilerdian stage, may be related to the Late Paleocene Thermal Maximum (LPTM), or be at least nearly coeval with that climatic event. Thus, the impact of the LPTM may have been greater than hitherto realised, having also affected mid-latitude shallow-marine biota. This conclusion has been reached after a re-study of the calcareous plankton...
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