1-Buday, T., (1980): Stratigraphy and Palaeogeography. In: Kassab, I.I., and Jassim, S.Z., (eds): The Regional Geology of Iraq. Vol. 1. 445p.
2- Huyck, H., (1990). When is a metalleferous black shale not a black shale in: RiGranch and Hlo Huyck (eds): Metalliferous Black Shales and Related Ore Deposits - Proc. Washington, DC: U.S.G.S.
3- Al-Jassim, J.A., Al-Sheikhly, S.J. and Al-Tememmy F.M., (1989).Biostratigraphy of the Kometan Formation (L.Turo-nian-Early Campanian) in northern Iraq. J.Geol. Soc. Iraq. Vol. 22, No.l.pp. 53-60.
4- Bandy, O. (1967). Cretaceous Planktonic Foraminifera Zonation. Micropal., Vol.13, No. 1, pp. 1-31.
5- Agip, S.P.A.S. Donato Milanese, 1988. Southern Tethys Biofacies: Italy
6- Amer, R.M. (1993). Upper Cretaceous microfacies of Iraq. (GEOS-U'RV), Unpublished Report.
7- Trujillo, E. F., 1960: Upper Cretaceous Foraminifera From Near Redding. Shasta County, California. Jour. of Palaeontology, Vol.34, NO. 2, pp. 290-346.
8- Eircher, D., and Worstell, P., (1970). Cenomanian and Toronan For a-minefera from the Great Plains, United States. Micropal. VoL16. No. 3, pp. 269-324.
9- Butt, A., (1973). Foraminiferal of the type Toronian. Micropal. Vol. 12, No.2
10- Oschmann, W., 1995. Black shale models: An actualistic approach EuropaL. Vol. 8, pp. 26-35.
11- Nyong, E, and Olsson, R. K., (1984). A paleoslope model of Cenomanian to Lower Maastrichtian Foramini-fera in the North Amerca -Basin . Marine microp. Vol.8. No.6, pp. 437-473.
12- Kinsman, D.J.J., (1969). Interpretation of Sr+" concentration in carbonate minerals rocks. Jour. Sed. Pet. Vol.39, pp. 484-508.
13-. AL-Rubaie, N.M., (1985): Geochemistry and petrology of the Jadd-ala Formation in selected sections. Iraq. (unpu-blished M.Sc. Thesis,). Baghdad University, 249p.
14- Arthur, M., and Segeman, B., (1994). Marine black shale deposition mechanism and environments of ancient deposits. Annu. Rev. Earth Planet Sci., Vol.22, pp. 499-551
15- Masson, B., (1966). Principle of Geochemistry. John Wily and Sons, Inc.New York, 328 p.
16- Flugel, F., (1982). Microfacies Analysis of Limestone. Translated by K.Christenson. Springer-Verlag. New York, 632 p.
17- Gibbson, I. G., (1989). Planktonic, benthonic Foraminiferal ratios: modern pattern and Tertiary applicability. Mar. Micropal., Vol. 15 pp. 19-:52