Rhaetavicula contorta

References

Rhaetavicula contorta

bivalve species

Written by

The Information Architects of Encyclopaedia Britannica

Learn about this topic in these articles:

Triassic Period
The Triassic-Jurassic boundary
…contain the distinctive bivalve species Rhaetavicula contorta but no ammonoids. Rocks of this R. contorta zone in northwestern Europe have been correlated with the stratotype of the Rhaetian Stage, the marine Kössen beds in the Rhaetian Alps, mainly on the basis of the common occurrence of R. contorta. The Alpine…
Read More
…contain the distinctive bivalve species Rhaetavicula contorta but no ammonoids. Rocks of this R. contorta zone in northwestern Europe have been correlated with the stratotype of the Rhaetian Stage, the marine Kössen beds in the Rhaetian Alps, mainly on the basis of the common occurrence of R. contorta. The Alpine…
Read More