The Older Parian Group is a geologic group in Trinidad and Tobago. The bituminous limestone preserves fossils of Didymotis trinidadensis dating back to the Aptian period.Older Parian Group at Fossilworks.org
See also List of fossiliferous stratigraphic units in Trinidad and Tobago
References
Further reading
L. Sommermeier. 1918. Über einen Fossilfund aus der Unteren Kreide von Trinidad. Centralblatt für Mineralogie, Geologie und Paläontologie 1918:131-136