biostratigraphy and paleoecology of cretaceous/tertiary boundary in ...

Chapter Five
Conclusion
E- Kato section (Barzinja area)
e1 – Upper part of Racemiguembelina fructicosa Interval Zone (CF4),
(Interfingering Aqra Limestone), (Late Maastrichtian)
e2 - Pseudoguembelina hariaensis Interval Zone (CF3), (Interfingering Aqra
Limestone), (Late Maastrichtian)
11– Gali, Dokan and Sirwan sections in the studied area represent the most
continuous sedimentary sequences across the K/P mass extinction boundary.
The planktonic foraminiferal assemblages are very rich to moderate diversified
and an excellent to good state of preservation respectively. These
assemblages are similar to those of EL Kef, Tunisia and other continuous K/P
boundary sections.
12- It is relevant to declare that one of the results within these accessible
conclusions of this dissertation will sustain the inferred assumption by Al-
Barzinjy 2005, which proved that the Red Bed Series and Kolosh Formation
sharing the same depositional basin and having the same tectonic setting.
Moreover, both are representing lateral facies change of each other, in addition
to that the foreland basin of Tanjero Formation during the Cretaceous/Tertiary
boundary extended laterally and transversally in northeast and occupied the
area from Sirwan, Halabja, Barzinja, Qala Cholan and Sura Qalat representing
proximal area which gradually changed to the Red Bed Series (Kato and
Qishlagh section) as conformable boundary in a rapid subsiding costal area.
While in the southwest distal area of this basin the Tanjero Formation gradually
changed to the Kolosh basin in Dokan and Smaquli area, the deeper part of
depositional environment.
13- Quantitative high-resolution biostratigraphic analysis of planktonic
foraminifera at studied sections indicates that the extinction occurred over a
short period of time. At Smaquli area 22 species of the Cretaceous planktonic
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