Palynological and Stratigraphical Evidences on the Age of the Outcropped Khabour Formation near Chalki Nasara Village, Kurdistan Region, Northern Iraq

Dler H. Baban & Fadhil A. Lawa
University of Sulaimani - School of Science - Department of Geology, Kirkuk Street, Sulaimaniyah, Kurdistan Region/Iraq


The siliciclastic predominate sequence of the Khabour Quartzite-Shale
Formation crops out in Kurdistan Region within a narrow strip which runs semi-parallel
to Iraq/Turkey border line, within the Imbricated and Thrusted Ora Zone, in front of the
Bitlis Suture Zone which resulted from the collision of the Arabian and Anatolian plate.
The studied samples from Chalki Nasara section appeared to be deposited within shallow
marine environment and considered as a part of the Tectono- megasequence Ap.2.
The identified seventy nine palynomorphs within the prepared palynological
slides were all acritarchs with no observation of other known Lower Paleozoic
palynomorphs like chitinozoa, scolecodonts, and graptolites. The identified acritarch
species are among those which well documented in Cambrian and Ordovician periods
such as Acanthodiacrodium angustum, Dactylofusa squama, Cristallinium cambriense,
Saharidia fragilis, Acanthodiacrodium ubuii, Polygonium gracile, Acanthodiacrodium
achrasii, Gonisphaeridium tener, Actinotodissus formosus, Polygonium pungens,
Actinotodissus spinutisus, Cymatiogalea membranispina, Polygonium symbolum,
Actinotodissus crassus. Accordingly and depending on the three distinguished acritarch
assemblage palynozones and the stratigraphic position, the age of the lower unit of
Khabour Formation in the studied area determined as Late Cambrian-Tremadocian.
The dark brown and black colors of the identified palynomorphs within the
formation indicated to thermally post mature condition of the organic matters. On the
other hand, kerogen type I appeared to be the dominated quality of the existed organic
matters and that based on the ratio between the different organic matter components.

Key Words:


Abd- Alwahab, N. "Basin Analysis of Paleozoic Succession", Iraq, PhD thesis (Unpublished), University of
Baghdad, Iraq, 110p. (2014).

Al- Ameri, T.K. "Palynostratigraphy and the assessment of gas and oil generation and accumulations in the
Lower Paleozoic , Western Iraq", Arabian Journal Of Geoscience, Springer, Vol. (3), pp. 155-179. (2010).

Al- Ameri, T.K. and Baban, D.H. "Acritarchs and chitinozoan stratigraphy of the Ordovician Khabour
Formation, Western Iraq", Iraqi J. Sci., 41c (3): 101-112. (2000).

Al- Ameri, T.K. and Baban, D.H. "Hydrocarbon generation potential of Lower Paleozoic Succession,
Western Iraqi Desert", Iraqi J. Sci, 43, 77-199. (2002).

Al-Bassam, K. S. " Petrology, geochemistry and depositional environment of the Khabour Formation in Ora
and Khabour localities, Northern Iraq", Iraqi Bulletin of Geology and Mining Vol.(6), No.2, pp.71− 94.(2010).

Al-Haba, Y.K., Al-Samarrai, A., Al-Jubouri, F., Georgis, N.N., and Ahmed, I.M. "Exploration for the
Paleozoic prospects in western Iraq, Part 1: exploration of the Paleozoic system in western Iraq. In: Second
Seminar on Hydrocarbon Potential of Deep formations in the Arab Countries (OAPEC), Cairo, pp. 1–21. (1994).

Al-Hadidy, A.H. "Paleozoic stratigraphic lexicon and hydrocarbon habitat of Iraq", GeoArabia, Vol.(2),
No.I, pp.63-130. (2007).

Al-Juboury, A.I. and Al-Hadidy, A. H. "Petrology and depositional evolution of the Paleozoic rocks of
Iraq", Marine and Petroleum Geology Vol.(26), pp.208–231. (2009).

Al-Laboun, A.A. "Stratigraphy and hydrocarbon potential of the Paleozoic succession of both the Widyan
and Tabuk basins, Arabia". In Halbouty, M. (ed.), Future Petroleum Provinces of the World, American
Association of Petroleum Geologists Memoir no. 40, pp. 373–397. (1986).

Aqrawi, A.A.M. "Paleozoic Stratigraphy and Petroleum Systems of the Western and Southwestern Deserts
of Iraq", Geoarabia, Vol.(3), No.2, pp. 229-248. (1998).

Aqrawi, A. A. , Goff, J.C. , Horbury, A.D., and Sadooni, F.N. "The Petroleum Geology of Iraq: scientific
press ltd, Beacons field, bucks, UK", 592p. (2010).

Al-Samarrai, A., Al-Juboury, F., Khushaba, A., Al-Rabaii, M., Sahara, A., Beruti, A., and Beko, T.
"Geological studies of Akkas Field". Oil Exploration Company (unpublished report), Baghdad, 256p. (1994).
Baban, D. H. "Maturation and Palynostratigraphy of Lower Paleozoic Strata in Western Iraqi Desert", PhD
thesis (unpublished), Baghdad University, Iraq, 220p. (1996).

Beydoun, Z.R., "Arabian plate hydrocarbon geology and potential—a plate
tectonic approach", AAPG studies in geology, No. 33, 77 p. (1991).

Bellen, R.C. VAN, Dunnington, H.V., Wetzel, R., and Morton, D.M. ( eds.) "Lexique Stratigraphic
International, Asie, Iraq", IGCCS: Paris, Vol. III, Fascicule 10a, 333p. (1959).

Bryhni, I., Bockelie, J. Fr . , Nystuen, J. P. "Excursion in the Scandinavian Caledonides". The southern
Norwegian Caledonides, Oslo-Sognefjord-Ålesund. Uppsala Caledonide Symposium ( UCS), UCS
Excursion, No. A1, 150p. (1981).

de la Puente, G.S. and Rubinstein, C. V. "Late Tremadocian chitinozoans and acritarchs from northwestern
Argentina (Western Gondwana)", Review of Palaeobotany and Palynology, Vol. (154), pp. 65–78. (2009).

Deunff, J. and Massa, D. "Palynologie et stratigraphie du Cambro-Ordovicien (Libye nord-occidentale)",
Comptes Rendus des séances de l'Académie des Sciences, séries D 181 (21), pp. 21-24. (1975).

Di Millia, A., Tongiorgi, M., and Albani, R. "Acritarch Findings in Early Paleozoic, Low-Grade
Metasediments of Sardinia (Italy)": a review, Revista Espanola De Paleontologica, Vol. (8), No. 2, pp.170-
176. (1993).

Ditmar, V., Afanasiecv, J. and Shanakova, E. "Geological conditions and hydrocarbon prospects of the
Republic of Iraq (Northern and Central parts)". INOC Library, Unpublished Report, Baghdad. (1971).

Fombella, M.A. "El transito Cambrico - Ordovicico, Palinologiay diacronismo, Provincia de Leon, No de
Espana". Rev. Espanaola de Micropaleont., Vol.(18), No.2, pp. 165-179. (1986).

Fombella, M.A. "Resemblaces and differences between the palynological associations of Upper Cambrian
age in the NW of Spain (Vozmediano) and North of Africa"; Rev. Micropaleont. Vol.(30), No.2, pp.111-116.

Ghavidel-syooki, M. "Palynostratigraphy and Palaeobiogeography of lower Palaeozoic strata in the Ghelli
area, northeastern Alborz range of Iran (kopet-dagh region)", J. Sci. I. R. Iran Vol. (11), No.4. (2000).

Ghavidel-syooki, M. and Vecoli, M. "Palynostratigraphy of Middle Cambrian to lowermost Ordovician
stratal sequences in the High Zagros Mountains, southern Iran: Regional stratigraphic implications, and
palaeobiogeographic significance", Review of Palaeobotany and Palynology, Vol.(150), pp. 97–114. (2008).

Ghienne j. F, Monod, O., Kozlu, H., and Dean, W.T. "Cambrian–Ordovician depositional sequences in the
Middle East: A perspective from Turkey". Earth Science Review ,Vol.(101), No.3, pp.101–146. (2010).
, M.C. "Lower Paleozoic Units in the Alpine Terranes of Turkey". 3. Int. Meeting of IGCP 351,
“Ear y Pa e z i Ev ti i NW dwa a”, T rkish Ass . Petr . e gists, Spe . P b . N . 11.(1995).

, M.C. and Kozlu, H. "Early Paleozoic evolution of the NW Gondwanaland: data from southern
Turkey and surrounding regions". Gondwana Research, Vol.(3), pp.315-323. (2000).

, M. C., E i ki, O., z , H. a d rs , S. "Cambrian". In: Goncuoglu, M.C. & Bozdogan, N.
(eds), Guidebook Paleozoic of Eastern Taurides.22-41. Turkish Assoc. Petrol. Geol., Spec. Publ., No:7,
Ankara. ISBN: 978-975-95677-2-9. (2012).

Hamza , N.M, and Isaac E.A. "Geology survey of the Area between Beanvi and Greater Zab River",
Geological Survey of Iraq, Internal Report, Baghdad. (1971).

Jachowicz-zdanowska, M. "Cambrian organic microfossils at the border area of the east- and west-
European platforms (SE Poland and Western Ukraine)", Annales Societatis Geologorum Poloniae,Vol.(81),
pp. 241–267. (2011).

Jassim, S.Z., and Goff, J.C.( eds.) "Geology of Iraq", first edition: Brno, Czech Republic, Prague and
Moravian Museum, 355p. (2006).

Karim, K.H. "Analytical comparison study between the Khabour and Tanjero formations from North Iraq",
Iraqi Journal of Earth Science, Mosul University, Vol. (6), No. 2, pp.1-12. (2006).

Ma’a a, .A., Hassa , ., Mis i, H. Sh., A -Azzawi, A., Lawa, F., Qadouri, N.A., Yakta, S., Sattar, A.,
Al-Mukhtar, L., Hammoudi, B. "Detailed geological survey of Sunat- Marsis area", GEOSURV, Internal
report no. 1974. (1990).

Majidee, F. M.Q. "The reasons of high temperature in well Akkas-1 and its effect on maturation's time of
source rocks", MSc thesis (unpublished), Baghdad University, Iraq, 88p. (1999).

McCarthy, M. J." Final report on geology between the Zab and Khabour rivers (Manuscript Report),
GEOSURV, Baghdad. (1955).

McGillivray, J.G. and Husseini, M. I. "The Palaeozoic petroleum geology of central Arabia". American
Association of Petroleum Geologists Bulletin, Vol. (76), No. 10, pp. 1473-1490. (1992).

Martin,F. "Uppermost Cambrian and Lower Ordovician Acritarchs and Lower Ordovician Chitinozoans
from Wilcox Pass, Alberta", Geological Survey of Canada, Bulletin 420, 57p. (1992).

Mehrjerdi, H. "Palynostratigraphy and Palaeobiogeography of a Lower Palaeozoic Sequence in the Type-
Section of Shirgesht Formation, Northern Tabas City, East-Central Iran", Iranian Int. J. Sci. Vol. (2),
No.2. (2001).

M zydł wska, M. a d St kf rs, M. "Acritarchs from the Cambrian-Ordovician Boundary Interval on
Kolguev Island", Arctic Russia Palynology, Vol. (28), pp. 15-73. (2004).

Nowak, H., Akodad, M., Lefebvre, B. and Servais, T., 2015, Discovery of the messaoudensis. trifidum
acritarch assemblage (upper Tremadocian - lower Floian, Lower Ordovician) in the subsurface of Morocco,
Estonian Journal of Earth Sciences, Vol. (64), No. 1, pp. 80-83. (2015).

Numan, N.M.S. "A plate tectonic scenario for the Phanerozoic succession in Iraq", Iraqi Geological Society
Journal, Vol. (30), No.2. (1997).

Olaru, L. "Some Problems of Biostratigraphy and Palynological Correlation of Upper Formation (Tg. 4)
from Tulgheş Group, East Carpathians (Romania)", Acta Palaeontologica Romaniae, Vol. (5),pp. 351-366.

Omer, M. F. "Sedimentology and Geochemistry of Khabour Formation in Northern Iraq", PhD thesis
(unpublished), Baghdad University, Iraq. (2012).

Palacios, T, Jensen, S., Barr, S.M., White, C.E. and Miller, R.F. " New biostratigraphical constraints on the
lower Cambrian Ratcliffe Brook Formation, southern New Brunswick, Canada, from organic-walled
microfossils" Stratigraphy, Vol.(8), No. 1, pp. 45-60. (2011).

Palacios, T., Jensen, S., White, C. E., and Barr, S. M. "Cambrian acritarchs from the Bourinot belt, Cape
Breton Island, Nova Scotia: age and stratigraphic implications", Can. J. Earth Sci. Vol.(49), pp. 289–307.

Paris, F., Grahn, Y., Nestor, V. and Lakova, I. "A revised Chitinozoan classification", Journal of
Paleontology, Vol.(73), No.4, pp. 549-570. (1999).

Paris, F., Achab, A., Asselin, E., Chen, X.-H., Grahn, Y., Nõlvak, J., Obut, O., Samuelsson, J., Sennikof, N.
Vecoli, M.,Verniers, J.,Wang, X.-F. and Winchester-Seeto, T. "Chitinozoa" In: Webby, B.D., Paris, F.,
Droser, M., Percival,I. (eds.), The Great Ordovician Diversification Event. Columbia University Press, New
York, pp. 294–311. (2004).

Powers, R.W., Ramirez, L.F., Redmond, C.D., and Elberg, E.L. " Sedimentary Geology of Saudi Arabia" In:
The geology of the Arabian Peninsula, USGS Prof. Paper No. 560-D, 177p. (1966).

Rasul, S. M. "New species of the genus Vulcanisphaera (Acritarcha) from the Tremadocian of England",
Micropaleontology, Vol. (22), No. 4, pp. 479-484. (1976).

Rasul, S. M. "Acritarch Zonation of the Tremadoc Series of the Shineton Shales, Wrekin, Shropshire,
England" , Palynology, Vol. (3) , pp. 53-72. (1979).

Rubinstein, C., Mángano, M. G., and Bautois, L. A. "Late Cambrian acritarchs from the Santa Rosita
Formation: implications for the Cambrian-Ordovician boundary in the Eastern Cordillera, Northwest
Argentina", Revista Brasileira de Paleontologia, Vol.(6), pp.43-48. (2003).

Sadik, A. "Early Paleozoic sediments of the Zagros-Taurus-ranges". Geologische Rundschau, Vol. (66),
Issue 1, pp. 263-276. (1977).

Sargeant, W.A.S. and Stancliffe, R.P.W. "The Acritarch Polygonium, Vavrdova emend Sargeant and
Stancliffe 1994: A reassessment of its constitute species", Annales de la Societe Geologique de Belgique,
T.117, fasicule 2, pp.355-369. (1994).

Seilacher, A. "The oldest fossils in Iraq", Journ. Geol. Soc. Iraq , Vol.(1), No.2, pp. 17-21. (1961).
Seilachar, A. "Kaledonisher Unterbau fIrakidaian" , Neuses Jaharn Geolog Paleont Abt, Monatshefte. No.
10. (1963).

Sharland P.R., Archer, R., Casey, D.M., Davies, R.B., Hall, S.H., Heward, A.P., Horbury, A.D., and
Simmons, M.D. "Arabian plate sequence stratigraphy", GeoArabia, special publication 2. Gulf Petro-Link,
Bahrain. (2001).

Sharland, P.R.,. Casey, D.M, Davies, R.B., Simmons, M.D. and Sutcliffe, O.E. "Arabian Plate Sequence
Stratigraphy", GeoArabia, Vol. (9), No. 1, pp. 199-214. (2004).

Staplin, F. L. "Sedimentary Organic Matter, Organic Metamorphism and oil and gas occurrences", Bull.
Canadian Petrol. Vol.(17), pp.47-66. (1969).

Stevanovitic, Z., Idrain, I., and Markovitic, M. "Geology and Hydrogeology of Kurdistan region", FAO,
Vol.(1), 175 p. (2003).

Sutcliffe,O.E., Dowdeswell, J.A., Whittngton, D.A.T, Theron J.N., and Carig, J. "Calibrating the Late
Ordovicain Galciation and mass extinctions by the eccentricity cycles of earth orbit", Geology, Vol. (28),
pp.967-970. (2000).

Stöcklin, J. "Structural history and tectonics of Iran: a review", American Association of Petroleum
Geologists Bulletin, Vol.(52), No. 7, pp.1229-1258. (1968).

Vanguestaine, M. "Early and Middle Ordovician acritarchs of the Senne-Sennette river valleys (Brabant
Massif, Belgium) and their stratigraphic implications", Geologica Belgica , Vol. (11), pp. 3-24. (2008).

Vanguestaine, M. & Leonard, R. "New biostratigraphic and chronostratigraphic data from the Sautou
Formation and adjacent strata (Cambrian, Givonne Inlier, Revin group, northern France) and some
lithostratigraphic and tectonic implications" In Debacker, T, Sintubin, M & Verniers J. (eds) Avalonia-
Moesia: Early Palaezoic orogens in the Trans-European Suture Zone, Geologica Belgica,Vol. (8), No. 4, pp.
131-144. (2005).

Vecoli, M. "Stratigraphic significance of acritarchs in Cambro-Ordovician strata, Hassi-R’Mel area,
Algerian Sahara", Bollettino della Società Paleontologica Italiana, Vol.(35), pp. 3-58. (1996).

Vecoli, M. "Cambrian-Ordovician palynostratigraphy (acritarchs and prasinophytes) of the Hassi-R’Mel
area and northern Rhamades Basin, North Africa", Palaeontographia Italica, Vol.(86), pp. 1-112. (1999).

Vergel, M. M., Aceñolaza, F., and Aráoz, L. "Palynology of the Iscayachi Formation (Cambro-Ordovician)
from the Cordillera Oriental of Southern Bolivia: New data from thewestern margin of Gondwana",
Geologica Acta, Vol.(11), No.2, pp.167-176. (2013).

Welsch, A. "Die Acritarchen der höheren Digermulgruppe, Mittelkambrium bis Tremadoc, Ost-Finnmark,
Nord-Norwegen", Palaeontographica Abt. B 201 (1-4), pp. 1-109. (1986).

Wetzel,R. "Stratigraphy of the Amadiya Region", MPC Report, INOC Library, No. TR/RW12, Baghdad,
80p. (1950).

Ziegler, M.A. "Late Permian to Holocene Paleofacies Evolution of the Arabian Plate and its Hydrocarbon
Occurrences", GeoArabia, Vol.(6), No. 3,Gulf PetroLink, Bahrain, 504p. (2001).

Zylinska, A., Szczepanik, Z, and Salwa, S. "Cambrian of the Holy Mountains, Poland; biostratigraphy of the
Wisniowka Hill succession", Acta Geologica Polonica, Vol. (56), No. 4, pp. 443-461. (2006).