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 Three Biostratigraphy<br />
monmothensis (Olsson), H. holmdelensisOlsson, Abathomphalus mayaroensis<br />
(Bolli), A. <strong>in</strong>termedius (Bolli), Kugler<strong>in</strong>a rotundata (Bronnimann),<br />
Archaeoglobiger<strong>in</strong>a carteri (Kassab) Gubler<strong>in</strong>a cuvillieri Kiko<strong>in</strong>e, Gumbelitria<br />
cretacea Cushman,<br />
The planktonic foram<strong>in</strong>iferal assemblages represented by moderate number<br />
<strong>of</strong> species diversities <strong>in</strong> both Sirwan <strong>and</strong> Qulka section represented by 45<br />
species (figs. 3.2 <strong>and</strong> 3.5), while this number was reduced to 30 species <strong>in</strong> Kato<br />
section <strong>and</strong> 26 species <strong>in</strong> Qishlagh section , <strong>in</strong> Qishlagh the same assemblage<br />
<strong>and</strong> number <strong>of</strong> species cont<strong>in</strong>ued from previous P. Intermedia Biozone to R.<br />
fructicosa zone with addition to the nom<strong>in</strong>ate species <strong>of</strong> R. fructicosa, at the<br />
lower part <strong>of</strong> 10 meters only, after that all planktonic foram<strong>in</strong>iferal assemblages<br />
disappeared <strong>and</strong> replaced by larger foram<strong>in</strong>iferal community with other smaller<br />
benthonic forams for the total rema<strong>in</strong><strong>in</strong>g <strong>in</strong>terval <strong>of</strong> Tanjero Formation till the<br />
transitional <strong>in</strong>terval between Tanjero Formation <strong>and</strong> Red Bed series which is<br />
characterised by concentration <strong>of</strong> reworked larger foram<strong>in</strong>iferal assemblage <strong>and</strong><br />
dwarfed macr<strong>of</strong>ossils <strong>of</strong> pelecypods, gastropodes, brachiopodes <strong>and</strong> solitary<br />
corals like Cyclolites. planktonic forams represented by: Heterohelix<br />
navarroensis Loeblish, H. globulosa (Ehrenberg), H. striata (Ehrenberg), H.<br />
punctulats (Cushman), Planoglobul<strong>in</strong>a carseyae (Plummer), P. brazoensis<br />
Mart<strong>in</strong>, Rugoglobiger<strong>in</strong>a rugosa (Plummer), R. scotti (Bronnimann), R.<br />
hexacamerata Bronnimann, R. macrocephala Bronnimann, Gansser<strong>in</strong>a<br />
gansseri (Reuss), Globotruncanita stuarti (de Lapparent), G. stuartiformis<br />
Dalbez , G. conica White, Globotruncana aegyptiaca Nakkady,<br />
Contusotruncana contusa (Cushman), C. fornicata Plummer, C. plicata White,<br />
Globotruncana arca (Cushman), Glt. gagneb<strong>in</strong>i Tilev Globotruncanella<br />
petaloidea (G<strong>and</strong>olfi), Globiger<strong>in</strong>elloides volutes (White), Pseudotextularia<br />
elegans (Rzehak), P. deformis (kiko<strong>in</strong>e), Racemiguembel<strong>in</strong>a fructicosa (Egger),<br />
Pseudoguembel<strong>in</strong>a costulata (Cushman),<br />
The benthonic forams represented by : Boliv<strong>in</strong>a <strong>in</strong>crassata Reuss,<br />
Boliv<strong>in</strong>oides draco (Marsson), Cibicidoides dayi (White), C. subcar<strong>in</strong>atus<br />
Cushman & Deaderick, C. excavata Brotzen, Osangularia navarrana<br />
(Cushman), Pullenia jarvisi Cushman, Pyrul<strong>in</strong>oides sp. Ne<strong>of</strong>labell<strong>in</strong>a rugosa (d ,<br />
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