Petrography and Sedimentology of the Ghundai Sar Reef Complex, Jamrud; Khyber Agency; Pakistan
Abstract
A belt of Siluro-Devonian Coralline limestone of pink, yellowish-pink, and grayish-white colour is exposed in the hills of Ghundai Sar, near Jamrud; Khyber Agency. The entire formation represents deposition on a stable shelf. The environments were conductive for the development of coral reef. The ortho-quartzite associated with dolomite and limestone supports this observation. In this paper, petrography and sedimentology of the reef limestone is discussed in detail. 101 specimens were collected and 30 sections were cut to describe the petrography. The limestone and dolomite show variations in their mineralogical composition. All variations from arenaceous limestone to calcareous ortho-quartzite occur.
References
Ali, K. A., & Anwar, J., 1969. Stratigraphic studies of the Nowshera Reef Complex, Nowshera Tehsil; West Pakistan: Geol. Bull. Univ. Peshawar, 4(1), 33-43.
Chillinger, G. V., Bissel, H. J., & Fairbridge, V. R., 1967. Carbonate rock, Development in sedimentology (9A & AB): Elsevier Publishing Co., Amsterdam, London, and New York, pp. 89-105, and 225-259.
Cbulson, A. L., 1937. Marble of the North West Frontier Province, Geol. Surv. India Recs. v. 71, pt. 3, pp. 328-344.
Dunbar, C. O., & Rogers, J., 1957. Principles of stratigraphy: John Wiley and Sons, New York, pp. 88-89 and 232-237.
Khan, A. B.,Shah, Z. H., & Naeem, Sahlbzada, M., 1970. Geology of the Gbundai Sar and vicinity: Geol. Bull. Univ. Peshawar, 5(1), 115-130.
Khan, M. A., 1969. Siluro-Devonian Reef Complex of Ghuadai Sar and vicinity, Jarnrud; Khyber Agency: Geol. Bull. Univ. Peshawar, 4(1), 79-82.
Khan, M. A., 1970. The Ali Masjid Group, Jamrud; Khyber Agency: Geol. Bull. Univ. Peshawar, 5(1), 90-95.
Shah, S. M. I., 9969. Discovery of Palaeozoic rook in the Khyber Agency: Geonews, 1(3), 31-34.
Stauffer, K. W., 1968. Devonian reef complex near Nowshera, West Pakistan: Bull. Geol. Soc. America, 79, 1331-1350.
Stauffer, K. W., 1967. Devonian in India and Pakistan: Internat. Symposium Devonian System, Calgary, Canada, pp. 544-56.
Teichert, Curt, & Stauffer, K. W., 1965. Palaeozoic reef in Pakistan: Geol. Surv. Pakistan Recs., v. 14, pt. 3, 2 pp.
Tahirkheli, R. A. K., 1969. Another Palaeozoic reef discovery in Tangi Ghar, Peshawar Distt. Geol. Bull. Univ. Peshawar, 4(1), 90-91.
