Open AccessCALCAREOUS NANNOFOSSILS BIOSTRATIGRAPHY OF JADDALA FORMATION IN WELL (AJEEL-10), CENTRAL IRAQ
Author(s) -
Israa Sabah Al-Nuaimi,
Omar Ahmed Al-Badrani
Publication year - 2021
Publication title -
maǧallaẗ matḥaf al-tārīẖ al-ṭabī’ī/bulletin of the iraq natural history museum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.148
H-Index - 3
eISSN - 2311-9799
pISSN - 1017-8678
DOI - 10.26842/binhm.7.2021.16.3.0341
Subject(s) - biozone , biostratigraphy , calcareous , geology , paleontology , range (aeronautics) , materials science , composite material
A detailed systematic study of calcareous nannofossils was carried out for the Jaddala Formation in (Aj-10) well, Central Iraq. Seventy one species belong to twenty four genera of calcareous nannofossils were identified including sixty two of them were previously named and nine species were identified for the first time and they would not be given names until more information is obtained in the future to support this identification. It is a recorded of five biostratigraphic zone, which suggested the age of the Jaddala Formation to be of early to late Eocene. The recorded biozone includes the following: Reticulofenestra dictyoda (Deflandre in Deflandre & Fert, 1954) Stradner & Edwards, 1968 Partial Range Biozone (CNE 5); Discoaster sublodoensis Bramlette and Sullivan, 1961 Interval biozone (CNE 6-7); Nannotetrina cristata (Martini, 1958) Perch-Nielsen, 1971 Interval biozone (CNE 8); Nannotetrina alata (Martini in Martini & Stradner, 1960) Haq and Lohmann, 1976 Interval biozone (CNE 9); Chiasmolithus gigas Bramlette & Sullivan, 1961Range Biozone (CNE 10-11).