Список литературы

1 .Clifford Т. N., Radiometric dating and the pre-Silurian geology of Africa. In: E. I. Hamilton and R. M. Farquhar (Editors), Radiometric Dating for Geologists, Interscience, New York, N. Y., 299-416, 1968.

2. Engel A. E. J., Nagy В., Nagy L. A., Engel C. G., Kremp G. O. W., Drew С. М., Alga-like forms in Onverwacht Series, South Africa: Oldest recognized lifelike forms on earth, Science, 161, 1005-1008 (1968).

3. Gastil G., The distribution of mineral dates in time and space, Am. J. Sci., 258, 1-35 (1960).

4. Goldich S. S., Nier A. O., Baadsgaard H., Hoffman J. H., Krueger H., The Precambrian geology and geochronology of Minnesota, Minnesota Geol. Surv. Bull., 41, 1-193 (1961).

5. Holmes A., Principles of Physical Geology, 2nd ed., Nelson, London, 1288, 1966.

6. McGregor A. M., A Precambrian algal limestone in Southern Rhodesia, Trans. Geol. Soc. S. Africa, 43, 9-16 (1940).

7. Umbgrove J. H. F., The Pulse of the Earth, 2nd ed., Nijhoff, The Hague 358, 1947.