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Crustacean Burrows from Upper Maastrichtian Deposits of South-Central Cuba

Pszczółkowski A.

Bulletin of the Polish Academy of Sciences. Earth Sciences

2002

Vol. 50, nr 2

147-163

In south-central Cuba, the shallow-water limestones of the Late Maastrichtian Cantabria Formation underlie the Late Maastrichtian to Early Eocene Vaqueria Formation. The crustacean burrows (Thalassinoides isp.) occur in Late Maastrichtian marl of the lowermost part of the latter formation. Horizontal tunnels are the most common components of the reported low density burrow system produced in this shelfal deposit. Occurrence of Gansserina gansseri (Bolli), 1951, constrains the age of the burrow-filling biomicrite between 68 (probably 67) and 65.45 Ma. The submergence of the Cantabria shallow-water limestones and sedimentation of the burrow-filling biomicrite coincide with the high sea-level during Late Maastrichtian. The Late Maastrichtian deposits were partly truncated by pre-Palaeocene (K-T boundary?) erosion. However, in comparison with the successions of western Cuba, the Cienfuegos sedimentary basin occupied a more remote position in respect to the Chicxulub impact crater in Yucatan, thought to be the K-T event source.