Statistical Study of the Dhok Pathan formation, Puki Gudikhel, Durghar Range, Karak.
Abstract
Size analyses of a part of the Dhok Pathan Formation, Surghar Range, was carried out to study the behavior of different size fractions and to interpret the environments of deposition. The measures obtained on phi-scale reveal that the sandstone of the area is medium to fine grained, moderately sorted, positively skewed and has platykurtic distribution. The C-M pattern for these sediments suggests suspension and tractive current deposits, and is comparable in appearance with the basic pattern IV and V of Passega (1957). There is no systematic horizontal or vertical variation in different statistical measures but present a rather zigzag pattern which indicates that the material of variable size was brought to the basin between each cycle.
References
Abid, I.A., Abbasi, LA., Khan. M.A. & Shah, M.T., 1983. Petrography and geochemistry of the Siwalik Sandstone and their relationship with Himalayan orogeny. This volume.
Allen, J.R.L., 1965. Finding upward cycles in alluvial successions, Gtol. Jour, 4, 229-246.
Danilchik, W., 1961. The Iron formation of the Surghar and western Salt Range, Mianwali district, West Pakistan. US. Geol. Surv. Prof. Paper 424-D, 828-231.
Folk, R.L., 1966. A review of grain size parameters. Sedimentology 6, 73-93,
Folk, R.L., and Ward, W.C., 1957. Brazos River Bar: A study in the significance of grain size parameters. J. Sed. Petrol 27, 3-26.
Griffiths, J.C., 1951. Size versus sorting in some Carribbean sediments. J. Geol. 59, 211-243.
Hough, J.V., 1942. Sediments of cape Cod Bay, Massachusetts. J. Sed. Petrol. 12, 10-30.
Inman, D.L. 1952. Measures for describing the size distribution of Sediments. J. Sed. Petrol. 22, 125-145.
Koldijk, W.C., 1968. On environment sensitive grain size parameters. Sedimentology 10, 57-68.
Meissaer, C.R., Master, J.M., Rashid, M.A. & Hussain, M., 1974. Stratigraphy of the Kohat Quardrangle, Pakistan, U.S.G.S. Prof. Pap. 716-D.
Otto, G.H. 1939. A modified logarithmic probability graph for the interpretation on mechanical analysis of sediments, J. Sed, Petrol. 9, 62-75.
Passega, R., 1957. Texture as characteristic of clastic deposition. Bull. Am. Assoc. Petrol. Geol. 41, 1952-1984.
Rizvi, S.R.A., 1972. Geology and sedimentation trends in Palamau Coalfields, Bihar, India. Mem, Geo. Surv. Ind. 104, 54-61.
Sahu, B.K., 1964. Depositional mechanisms from the size analysis of the Clastic Sediments J. Sed. Petrol. 34, 72-83.
Saxena, S.K., 1963. The Pachmarhi Sandstones: a statistical study of size analysis. Jour. Geol. Surv. Ind. 4, 116-129.
Tandon, S.K., 1972. Mechanical analysis of Middle Siwalik Sandstones from Ramnagar, Nainital District, Kurnaon Himalaya J. Geol. Soc. Ind. 13, 51-58.
Trask, P.D., 1930. Mechanical analysis of sediments by centrifuge. Econ. Geol. 25, 581-599.
