Hostname: page-component-745bb68f8f-5r2nc Total loading time: 0 Render date: 2025-01-22T14:13:10.504Z Has data issue: false hasContentIssue false
  • English
  • Français

Nahan Sandstone and its exfoliation, Nainital District, Uttar Pradesh, India

Published online by Cambridge University Press:  01 May 2009

Brijraj K. Das  and
Vanshnarayan
Brijraj K. Das
Affiliation:
Centre of Advanced Study in Geology, Panjab University, Chandigarh-14, India
Vanshnarayan
Affiliation:
Department of Geology, Banaras Hindu University, Varanasi, India
Get access Rights & Permissions [Opens in a new window]

Summary

The Nahan sandstone of the Nainital district is a soft, fine-grained sandstone of subgreywacke type. Like massive igneous rocks it is very well exfoliated and consists of many concentric layers. Petrographic study of different layers of this sandstone, modal analysis, grain size analysis, and size distribution of the various samples, have revealed that physical processes are mainly responsible for exfoliation of the sandstone. The study of various sedimentary parameters indicated that the provenance is from the schistose and granitic rocks of the surrounding Himalayan mountains and the material was deposited in a shallow slowly sinking basin.

Type
Articles
Information
Geological Magazine , Volume 108 , Issue 3 , May 1971 , pp. 229 - 234
Copyright
Copyright © Cambridge University Press 1971

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Blackwelder, E. 1925. Exfoliation as a phase of rock weathering. J. Geol. 33, 793–806.CrossRefGoogle Scholar
Bradley, W. C. 1963. Large-scale exfoliation in massive sandstones of Colorado Plateau. Bull. geol. Soc. Am. 74, 519–28.CrossRefGoogle Scholar
Folk, R. L. 1962. Of Skewnesses and sands. J. sedim. Petrol. 32, 145–6.CrossRefGoogle Scholar
Folk, R. L. & Ward, W. C. 1957. Brazos River bar: a study in the significance of grain-size parameters. J. sedim. Petrol. 27, 3–26.CrossRefGoogle Scholar
Friedman, G. M. 1961. Distribution between dune, beach and river sands from their textural characteristics. J. sedim. Petrol. 31, 514–29.Google Scholar
Krishnan, M. S. 1960. Geology of India & Burma, 4th ed., Higginbothams (Private) Ltd, Madras.Google Scholar
Krumbein, W. C. & Sloss, L. L. 1963. Stratigraphy and sedimentation, 2nd ed., W. H. Freeman & Co., London, 660 pp.Google Scholar
Pettijohn, F. J. 1957. Sedimentary rocks. Harper & Brothers, New York, 718 pp.Google Scholar
Simpson, D. R. 1964. Exfoliation in the Upper Pocahontas sandstone, Mercer County, West Virginia, Am. Jour. Sci. 262, 545–51.CrossRefGoogle Scholar