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

Chapter Five
Conclusion
from the upper part of Tanjero Formation and lower part of Kolosh Formation
around K/T boundary. Based on the time scale, the sedimentation rate varies
from zone to zone. In particular, low rates of sediment accumulations in the Gali
section were observed from the base of Maastrichtian at upper most part of
(CF8) to the end of (CF3).Low to moderate rate of depositions were
recorded in both Qulka and Sirwan sections for CF4 .and (CF3).
In the sequences above the (CF3), and from the base of (CF2) in all
three mentioned localities, the sedimentation rate rapidly increased and
recorded high rate sedimentation just 0.5myr below the K/T boundary to the
lower Paleocene age through out the (CF2, (CF1), (p0), (pá), (P1a) and
(P1b). It is worthy to mention that the sedimentation rates in all three mentioned
studied sections from 65.5my to 64.5my were around 75 -100m/ma. 0.5my
below and above the Cretaceous/Tertiary boundary, which reveal continuations
and increasing the sediment accumulation without interruption or any gaps to
be disclosed along the contact of K/T boundary.
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