The Geological Time-Scale

Article metrics

Abstract

RECENTLY Dr. K. I. Mayne, Dr. R. St. J. Lambert and D. York1 proposed an extended geological time-scale which would place the middle of the Upper Cambrian at about 650 million years ago compared with 450 million years of the Holmes scale2. Their scale is based primarily on the ages they obtained by the potassium–argon method on biotite from several British granites ; however, they cite many other age measurements for secondary support. It is the purpose of this communication to point out that most of the cases cited are either incorrect or not definitive to the argument. In addition, both they1,3 and Prof. C. F. Davidson3 refer at some length to our as yet unpublished isotopic study of the Swedish kolm. These comments contain errors of fact and interpretation which will be clarified by the full report which will appear elsewhere ; but in view of the widespread misconception concerning this interesting material some discussion appears needed at this time. The British granites referred to above are being remeasured in this laboratory and results will be reported later.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Mayne, K. I., Lambert, R. St. J., and York, D., Nature, 183, 212 (1959).

  2. 2

    Holmes, A., Trans. Geol. Soc. Glasgow, 21, 117 (1947).

  3. 3

    Davidson, C. F., Nature, 183, 768 (1959). Mayne, K. I., Lambert, R. St. J., and York, D., Nature, 183, 769 (1959).

  4. 4

    Miller, D. S., and Kulp, J. L., Trans. Amer. Geophys. Union, 39, 525 (1958).

  5. 5

    Miller, D. S., and Kulp, J. L., Econ. Geol., 53, 937 (1958).

  6. 6

    Kulp, J. L., and Long, L. E., Trans. Amer. Geophys. Union, 39, 522 (1958).

  7. 7

    Long, L. E., Kulp, J. L., and Eckelmann, F. D., Amer. J. Sci. (in the press).

  8. 8

    Kruger, Fredrick C., Geol. Soc. Amer. Bull., 57, 161 (1946).

  9. 9

    Damon, P. E., and Kulp, J. L., Amer. J. Sci., 255, 697 (1957).

  10. 10

    Hurley, P., et al., Atom. Energy Comm. Rep. NYO 3938 (December 1958).

  11. 11

    Adams, J. A. S., Edwards, G., Henle, W., and Osmond, K., Geol. Soc. Amer. Bull., 69, 1527 (1958).

  12. 12

    Cobb, J. C., and Kulp, J. L., Geol. Soc. Amer. Bull., 69, 1547 (1958).

  13. 13

    Cobb, J. C., and Kulp, J. L. (to be submitted to Geochim. et Cosmochim. Acta).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

KULP, J., COBB, J., LONG, L. et al. The Geological Time-Scale. Nature 184, BA62–BA63 (1959) doi:10.1038/184062a0b

Download citation

Further reading

Comments

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.