Keywords : Jaddala

Transversopontis omarians sp.nov. Calcareous Nannofossils from Jaddala Formation (Eocene) in Dh.1 well, central Iraq

Mohammad H. Al-Ubaidi; Omar A. Al-Badrani

Iraqi National Journal of Earth Sciences, 2012, Volume 12, Issue 3, Pages 73-78

Transversopontis omarians sp.nov. is described from Jaddala Formation (Eocene) in Dh.1well, central Iraq. This species is recognized by having elliptical muroliths with transverse bar lacking two openings in the ends of the central area, it is reaching about 10 microns in length.

Nannobiostratigraphy of Jaddala Formation in Well(KH 12/7) West Iraq

Omar A. Al-Badrani

Iraqi National Journal of Earth Sciences, 2011, Volume 11, Issue 1, Pages 71-84

ABSTRACT Thirteen species of Calcareous Nanofossils were identified from the Jaddala Formation from well (KH 12/7) of depth (107-130 m.) west Iraq. The recorded calcareous nannofossils assemblages permits the recognition of two biozones these are (from top to bottom):2- Discoaster saipanensis Interval zone(Part) (CP14b) 1- Discoaster bifax Interval zone(Part) (CP 14 a)On the basis of biocorrelation with previous works Middle Eocene (Bartonian) age confirmed for the Jaddala Formation at the studied section.

Biostratigraphy of Planktonic Foraminifera in Aaliji and Jaddala Formations From East Baghdad Well No.2 , Middle Iraq

Abdullah S. Al-Hadidi; Farouk S.Al-Omari

Iraqi National Journal of Earth Sciences, 2004, Volume 4, Issue 1, Pages 86-97

Planktonic foraminifera are studied from Aaliji and Jaddala Formations in East Baghdad Well No.2 between the depth interval 1770-1900 m. Four biostratigraphic zones are recognized in these formations:
Globorotalia (A.) bullbrooki Zone (P.10).
Globorotalia (Morozovella) subbotinae subbotinae Zone (P.7).
Globorotalia (Morozovella) velascoensis Zone (P.5and6).
Globorotalia(Globorotalia)pseudomenardii Zone (P.4).
The results of this study are compared with the work of others inside and outside Iraq. The age of Aaliji in the said well is Late Paleocene - Early Eocene and that of Jaddala is Early – Middle Eocene.

Planktonic foraminifera and biostratigraphy of the Jaddala Formation (Eocene), Western Iraq

Majid M. Al-Mutwali; Tarik S. Abawi

Iraqi National Journal of Earth Sciences, 2003, Volume 3, Issue 1, Pages 67-86

Seventy eight planktic foraminiferal species and subspecies were recorded from the Jaddala Formation in some selected wells in western Iraq. On the basis of the stratigra-phic ranges of the recorded foraminifera, the studied sequence is attributed to the Morozovella formosa formosa, Acarinina pentacamerata, Acarinina bullbrooki, Globigerinatheka subconglobata subconglobata, Acarinina rotundimarginata, Hantkenina alabamensis, Truncorotaloides rohri rohri, Globigerinatheka mexicana mexicana and the Turborotalia cerroazulensis cerroazulensis Zones.
The present investigation indicates that the Jaddala Formation is upper Early-Late Eocene in age.