Abstract
The biostratigraphy of Balambo Formation has been investigated within a well-exposed section at the northeastern limb of Zozik anticline, near Barsarin Village, northeastern Iraq. The studied section consists mainly of marl, marly limestone and limestone. These rocks yielded moderately diversified planktonic foraminiferal fauna and radiolarian skeletons, in addition to some benthonic foraminifera and bioclast. The study is focusing on planktonic foraminiferal taxa, which are classified to ten species belonging to three genera. the stratigraphic distribution of the recorded species permits the recognition of five well defined biozones. These are in descending order: . Globigerinelloides algeriana Taxon range Zone. (part) . Globigerinelloides ferreolensis Interval Zone. . Globigerinelloides blowi Interval Zone. . Hedbergella sigali Interval Zone. . Globuligerina hoterivica Interval Zone. The planktonic foraminiferal biozones are correlated with other zonal schemes. They are considered to be extending from Late Valanginian to Late Aptian age. . Globigerinelloides algeriana Taxon range Zone. (part) . Globigerinelloides ferreolensis Interval Zone. . Globigerinelloides blowi Interval Zone. . Hedbergella sigali Interval Zone. . Globuligerina hoterivica Interval Zone.-
Highlights
INTRODUCTIONBarsarin village (Fig. 1), near Rawanduz town. The midpoint of the section is at ( 36° 32ˊ 00ʺ) Latitude and (44° 40ˊ 00ʺ) Longitude within the imbricated zone of the unstable shelf according to Jassim and Buday (2006)
The studied section is located in northeastern limb of Zozik anticline, near
This study enabled us to identify ten planktonic foraminiferal species (Fig. 2)
Summary
Barsarin village (Fig. 1), near Rawanduz town. The midpoint of the section is at ( 36° 32ˊ 00ʺ) Latitude and (44° 40ˊ 00ʺ) Longitude within the imbricated zone of the unstable shelf according to Jassim and Buday (2006). The Balambo Formation (Valanginian - Turonian) was first described by Wetzel in 1947 in (Bellen et al, 1959) from Sirwan Valley, near Halabja, northeastern Iraq. The type section is about 762m thick and embraces two divisions: Upper division composed of 503m of thin- bedded globigerinal limestone, passing downwards to radiolarian limestone. The studied section is 188m thick and consists of alternation of thin bedded pale brownish limestone, marly limestone and pale bluish marl. The lower boundary is recognized by the sharp contact between thick dolostone bed and thinly bedded limestone and marl of Sarmord and Balambo formations respectively. The upper boundary is gradational with the Qamchuqa Formation, determinate,may be determined by the alternation beds of thinly bedded marly limestone (Balambo Formation) and massive rocks of Qamchuqa Formation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
