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

Chapter Five
Conclusion
any geologist to observe the contact line or differentiated between them exactly
at Smaquli, Dokan and Sirwan valley. Consequently, it is reliable to conclude
that the two formations were sharing the same continuous depositional basin
around Upper Maastrichtian/Lower Paleocene Epochs.
4- The lateral and vertical relation of reddish to pale brown succession is
quite conformable with both underlying Shiranish and overlying Tanjero
Formations.
5-The well exposed reddish to pale brown succession has its own special
monotonous, conventional lithologic character differ from both underlying
Shiranish Formation and overlying Tanjero Formation, geographically extended
for more than 75Km and it has mapable thickness which reaches 72m.in Smaquli
Gali Gorge, with relevant feasible geologic age of Lower Maastrichtian about
2My duration. Consequently I propose the name of Smaquli Formation as a new
formal lithologic unit to display an incipient effort of formation rank according to
international stratigraphic nomenclature cod.
6- The planktonic foraminifera occurs continuously within the Upper
Cretaceous sequences in the sedimentary succession of the studied section at
Smaquli, Dokan and Sirwan valley, generally shows incessant in sedimentary
sequence without any interruptions.
7- The upper most part of Kolosh Formation in Smaquli area is characterized
by the attendance of five red claystone beds at the last 10 meters which start
from 30cm. to 2m. respectively, and overly by Gercus Formation, the contact is
seemed to be conformable by lithologic evidence of graditional change from dark
grey organic rich sediments of Kolosh Formation to red, purple mudstone,
sandstone, gritty marl, pebbly sandstone and conglomerates. The contact is
placed on the line where the sediment colour mainly began with red lithology.
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