Keywords : Palynostratigraphy


Palynostratigraphy, Age determination and Paleoecology of Butmah Formation in borehole Kand-1 Northern Iraq

Yasser H. Kddo; Amer D. Nader

Iraqi National Journal of Earth Sciences, 2014, Volume 14, Issue 1, Pages 33-48

Eight samples (K1-K8) from borehole Kand-1 covering (190) meters thick stratigraphic section were palynologically studied. They yield (36) species of sporomorphs belonging to (24) genera, three species were expected to be new. The miospore species recoved in this study indicate late Triassic age (Norian) and characterized by the dominance of many species of bisaccate non-striate pollen such as:
Alisporites australis, A. dunrobinensis,
warepanus, Falcisporites tecovasensis, Pityosporites scaurus, Protodiploxypinus acutus, P. americus, Samaropollenites speciosus.
In addition to monosaccate (Vesicate sporomorphs) represented by:
Patinasporites densus, Vallasporites ignacii, Enzonalasporites vigens.
The dominance of monosaccate pollen grains and the presence of the acritarchs, foraminiferal lining (acid-resistant inner coat) and fresh water algae in the lower part of stratigaphic section (K1-K3) indicate deposition in lagoonal environment with relatively high salinity and little supplies of fresh water. The increase of bisaccate pollen grains in the upper part of the sections (K4-K8) indicate deposition in relatively deeper environments (Inner shelf environment).

Palynostratigraphy and Paleoecology of the Upper Part of Akkas Formation in Borehole KH5/1in the Western Iraqi Desert

Noha D. Al-Sawaf; Amer D. Nader

Iraqi National Journal of Earth Sciences, 2008, Volume 8, Issue 2, Pages 64-81

Fourteen sample from the stratigraphic interval (1330-1600m.) in the borehole KH5/1 were studied palynoogically. The samples yielded well preserved and diversified palynomorphs except one sample at depth (1330m.) was barren.
Identification of (54) species of acritarchs belong to (29) genera and (16) species of Chitinozoans belong to (9) genera, (16) species of miospores belong to (13) genera and (6) species of Scolecodont belong to (4) genera was the conclusion of this study.
Comparision with similar palynomorphs in different parts of the worlds indicates clearly Upper Silurian (Ludlow) age for the samples studied. The Palynomorphs and especially the acritarchs reveal that the studied section was deposited in near