Letter | Published:

Dual Classification for Point-counting Limestones

Naturevolume 207pages849850 (1965) | Download Citation



MOST recent petrographic accounts of limestones utilize the classification of Folk1 as a basis for quantitative description, and as a convenient shorthand for general descriptions. During studies of English Upper Jurassic limestones it has been found that point-count results using Folk's categories do not adequately convey all the characters of a particular rock specimen.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Folk, R. L., Bull. Amer. Assoc. Petroleum. Geologists, 43, 1 (1959).

  2. 2

    Arkell, W. J., The Jurassic System in Great Britain (Oxford, 1933).

  3. 3

    Arkell, W. J., Mem. Geol. Surv. (G.B.), 341, 342, 343, etc. (1947).

Download references

Author information


  1. Department of Geology, University of Sheffield

    • R. C. L. WILSON


  1. Search for R. C. L. WILSON in:

About this article

Publication history

Issue Date



Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.