Efforts to extend the biostratigraphic
and geographic range of research on the microvertebrates from nodule-rich conglomerates in the Miocene of the Gulf Coast also include work in Louisiana on members underlying the productive Castor Creek Member of the Fleming Formation (Hinds 1998).
investigations revealed abundant planktonic foraminiferal species of Globotruncana, Heterohelix and Globotruncanita.
Some Siluro-Devonian biostratigraphic
works have been conducted since the 1970s in the Yulin area.
For such purpose previous detailed biostratigraphic
background supported by the recorded ammonites (Henriques, 1992, 1995), as well as sedimentological data allowing the interpretation of the location of the studied sections within the basin (Azeredo et al., 2003; Azeredo, 2007) were taken into account.
A similar correlation, although in contradiction to some East Baltic biostratigraphic
data, was recently published by Nielsen (2004).
It is notable that the early authors also regarded the formation as Late Silurian based on biostratigraphic
correlations with European faunas (Bastin and Williams 1914).
The fossils have been identified, and their biostratigraphic
and paleoecologic significance has been evaluated.
As additional large taxa are recovered from Fort Polk, the biostratigraphic
importance of the prosynthetocerine may weigh less heavily, and the Louisiana sites be linked more closely to the Burkeville Local Fauna.
biozones identified in the Kawagarh Formation in Khwari Khwar Section are Dicarinella asymetrica, Globotruncanita elevata and Globotruncana ventricosa biozones while in Khanpur Dam Section are Dicarinella asymetrica, Globotruncana ventricosa and Globotruncanita calcarata biozones.
observations based on the Upper Siwalik mammalian faunas of the Siwalik Group of India and Nepal.