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

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Chapter Four<br />

Depositional Environmenment <strong>and</strong> Paleoecology<br />

Agglut<strong>in</strong>ated percentages 40-45 <strong>and</strong> general benthonic morphotypes <strong>of</strong> Upper<br />

Cretaceous/Early Paleocene Paleodepth <strong>in</strong>dicators reveal middle to outer<br />

shelf bathymetry around 100 to 200m. depth. The paleobathymetric curve<br />

shows the regular trend <strong>in</strong> its values where it exhibits low to moderate<br />

percentages values, s<strong>in</strong>ce the preservation <strong>of</strong> foram<strong>in</strong>iferal species is<br />

generally good.<br />

Fig (4.5): The ma<strong>in</strong> Foram<strong>in</strong>iferal parameters derived from the quantitative analysis with the<br />

proposed paleodepth curve <strong>in</strong> the late Cretaceous/Early Paleocene succession <strong>in</strong>Sirwan section<br />

(Sirwan valley)<br />

97

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