biostratigraphy and paleoecology of cretaceous/tertiary boundary in ...
biostratigraphy and paleoecology of cretaceous/tertiary boundary in ...
biostratigraphy and paleoecology of cretaceous/tertiary boundary in ...
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Chapter Four<br />
Depositional Environmenment <strong>and</strong> Paleoecology<br />
Fig (4.7: 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> Kato section<br />
(Barz<strong>in</strong>ja area)<br />
In the studied area, the nature <strong>of</strong> Cretaceous-Tertiary contact characterized<br />
by vanish<strong>in</strong>g, obliteration <strong>and</strong> complete exterm<strong>in</strong>ation <strong>of</strong> planktonic foram<strong>in</strong>iferal<br />
assemblages, except <strong>of</strong> two species(Hedbergella monmothensis &<br />
Guembelitria cretacea) which they turnover the K/T <strong>boundary</strong> <strong>and</strong> form<strong>in</strong>g the<br />
new cha<strong>in</strong> <strong>of</strong> genetic radiation <strong>and</strong> phylogenetic reconstruction <strong>of</strong> the Early<br />
101
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