New Perspectives in Basin Analysis pp 189-200 | Cite as
The Use of Magnetic-Reversal Time Lines in Stratigraphic Analysis: A Case Study in Measuring Variability in Sedimentation Rates
Chapter
Abstract
Magnetic-reversal time lines of known age have been traced over a 15 km front of the Middle Miocene Chinji Formation of the Potwar Plateau in northern Pakistan, providing an example by which magnetic-reversal time lines can be used to measure stratigraphic variability in a fluvial sequence. The intrinsic lateral fluctuation, or nonuniformity, of sedimentation during early Chinji time averages 28%; vertical fluctuation, or unsteadiness of sedimentation, averages 41%. These fluctuations in sediment accumulation from place to place and from time to time characterize the fluvial system operating over the Potwar Plateau during Miocene time.
Keywords
Sediment Accumulation Magnetic Reversal Polarity Zone Paleomagnetic Data Stratigraphic Section
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References
- ALLEN, J.R.L. (1965) Fining upward cycles in alluvial successions. Geological Journal 4:229–246.CrossRefGoogle Scholar
- BARNDT, J., JOHNSON, N.M., JOHNSON, G.D., OPDYKE, N.D., LINDSAY, E.H., PILBEAM, D., and TAHIRKHELI, R.A.K. (1978) The magnetic polarity stratigraphy and age of the Siwalik Group near Dhok Pathan Village, Potwar Plateau, Pakistan. Earth Planetary Science Letters 41:355–364.CrossRefGoogle Scholar
- BEHRENSMEYER, A.K. and L. TAUXE (1982) Isochronous fluvial systems in Miocene deposits of Northern Pakistan. Sedimentology 29:331–352.CrossRefGoogle Scholar
- BERGGREN, W.A., KENT, D.V., FLYNN, J.J., and VAN COUVERING, J.A. (1985) Cenozoic geochronology. Bulletin Geological Society America 96:1407–1418.CrossRefGoogle Scholar
- JOHNSON, N.M. and MCGEE, VE. (1983) Magnetic polarity stratigraphy: Stochastic properties of data, sampling problems, and the evaluation of interpretations. Journal Geophysical Research 88:B2:1213–1221.CrossRefGoogle Scholar
- JOHNSON, N.M., STIX, J., TAUXE, L., CERVENY, PR, and TAHIRKHELI, R.A.K. (1985) Paleomagnetic chronology, fluvial process and implications of the Siwalik deposits near Chinji Village, Pakistan. Journal Geology 93:27–40.CrossRefGoogle Scholar
- KAPPLEMAN, J. (1986) Paleontology and Magnetic Polarity Stratigraphy of the Chinji Formation near Kanatti, Potwar Plateau, Pakistan. Ph.D. Dissertation, Harvard University, Cambridge, Massachusetts, 316 p.Google Scholar
- MANKINEN, E.A. and DALRYMPLE, G.B. (1979) Revised K-Ar polarity time scale. Journal Geophysical Research 84:615–626.CrossRefGoogle Scholar
- OPDYKE, N.D., KENT, D.V, and LOWRIE, W. (1973) Details of magnetic polarity transitions recorded in a high deposition rate deep-sea core. Earth Planetary Science Letters 20:315–324.CrossRefGoogle Scholar
- RAZA, S.M. (1983) Taphonomy and Paleoecology of Middle Miocene Vertebrate Assemblage Southern Potwar Plateau, Pakistan. Ph.D. Thesis, Yale University, New Haven, Connecticut, 212 p.Google Scholar
- SADLER, P.M. (1981) Sediment accumulation rates and the completeness of stratigraphic sections. Journal Geology 89:569–584.CrossRefGoogle Scholar
- SHEIKH, K.A. (1984) Use of Magnetic Reversal Timelines to Reconstruct the Miocene Landscape near Chinji Village, Pakistan. M.S. Thesis, Dartmouth College, Hanover, New Hampshire, 58 p.Google Scholar
- SHEIKH, K.A. and SHAH, S.M.I. (1984) Paleocurrent directions of Chinji Formation. Pakistan Geological Survey Memoir 11, pp. 75–80.Google Scholar
- TAUXE, L., KENT, D.V, and OPDYKE, N.D. (1980) Magnetic components contributing to the NRM of Middle Siwalik red beds. Earth Planetary Science Letters 47:279–284.CrossRefGoogle Scholar
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© Springer-Verlag New York Inc. 1988