Story perspectives

New Evidence Suggests Ammonites Survived K–Pg Boundary

1/3/2026

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Summary

Story summary

Some ammonites survived into the Danian, indicating longer persistence across the K–Pg boundary in Denmark compared with other regions.
Other ammonites were redeposited, suggesting a redistribution of remains after death.
The Cerithium Limestone at Sigerslev shows no signs of reworking, supporting the survival hypothesis for Danian ammonites.
Rødvig specimens indicate allochthonous origins, as they were found among Maastrichtian bioclasts instead of Danian deposits.

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Story summary

Some ammonites survived into the Danian, indicating longer persistence across the K–Pg boundary in Denmark compared with other regions.
Other ammonites were redeposited, suggesting a redistribution of remains after death.
The Cerithium Limestone at Sigerslev shows no signs of reworking, supporting the survival hypothesis for Danian ammonites.
Rødvig specimens indicate allochthonous origins, as they were found among Maastrichtian bioclasts instead of Danian deposits.