Petrology and The Grain Size Characters of the Pab Sandstone of Parts of the Loralai and Khuzdar Districts of Baluchistan

Authors

  • Akhtar Mohammad Kassi Department of Geology, University of Balochistan, Quetta
  • Amjad Rashid Qureshi Department of Geology, University of Balochistan, Quetta
  • Mohammad Ahmad Department of Geology, University of Balochistan, Quetta
  • Din Muhammad Kakar Department of Geology, University of Balochistan, Quetta

Abstract

Sandstone samples obtained from parts of the Pab Sandstone (Late Cretaceous) of Loralai and Khuzdar Districts were studied under polarizing microscope and classified as quartz arenite, lithic arenite and sub-lithic arenite which have been derived most probably from a mixed acid igneous and metamorphic terrain. On the basis of high maturity, subrounded to well-rounded nature of quartz grains, presence of calcareous fossil fragments and high values of sorting coefficient, it may be suggested that the formation may have been deposited in shallow marine (most probably beach) conditions.

References

Blatt, H., 1976. Original characteristics of clastic quartz grains. J. Sediment. Petrol. 37, 1-27.

Blatt, H. & Christie, J.M., 1963. Undulatory extinction in quartz of igneous and metamorphic rocks and its significance in provenance studies of sedimentary rocks. J. Sediment. Petrol. 33, 559-579.

Dott, R.H., 1964. Wacke, greywacke, and matrix - What approach to immature sandstone classification? J. Sediment. Petrol. 34, 625-632.

Folk, R.L., 1968. Petrology of sedimentary rocks. Austin, Tex., Hemphills, 124 pp.

Folk, R.L & Ward, W.C., 1957. Brazes River Bar: A study in the significance of grain size parameters. J, Sediment. Petrol. 22, 125-145.

Friedman, G.M., 1967. Dynamic processes and statistical parameters for size frequency distribution of beach and river sands. J. Sediment. Petrol. 37, 327-354.

Mason, C.C. & Folk, R.L, 1958. Differentiation of beach and eolian flat environments by size analysis, Mustang Island, Texas. J. Sediment. Petrol. 28, 211-226.

Vredenburg, E.W., 1908. The Cretaceous orbitoids of India. India. Geol. Surv. Mem. Recs. 36, 171-213.

Williams, M.D., 1959. Stratigraphy of lower Indus basin, West Pakistan. World Petroleum Cong. 5th, New York, Proc. L, Paper 19, 337-390.

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Published

1991-11-30

How to Cite

Kassi, A. M., Qureshi, A. R., Ahmad, M., & Kakar, D. M. (1991). Petrology and The Grain Size Characters of the Pab Sandstone of Parts of the Loralai and Khuzdar Districts of Baluchistan. Journal of Himalayan Earth Sciences, 24(1), 99-108. Retrieved from http://ojs.uop.edu.pk/jhes/article/view/1394

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