The influence of burrow-generated pseudobreccia on the preservation of fossil concentrations.

ABSTRACT: Burrowed discontinuity surfaces associated with condensed fossil concentrations demarcate breaks (hiatuses) in the Phanerozoic marine sedimentary record. Such intervals may be difficult to interpret in view of complex anatomy and varied fossil signatures. Transformation of a discontinuity surface into a heavily burrowed 'pseudobreccia' may further complicate the record, but this issue has remained unexploited to date. The richly fossiliferous Cretaceous-Paleogene (Maastrichtian-Danian) boundary interval exposed in Poland provides opportunities to test the influence of burrow-generated pseudobreccia on the preservation of associated hiatal fossil concentrations. Here, we document pseudobreccia anatomy and fossil-sediment relationships by three-dimensional X-ray computed tomography imaging.

SUBMITTER: Machalski M 

PROVIDER: S-EPMC11324866 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature