Abstract
IN an article in NATURE of June 22, 1929, p. 946, Dr. H. Dighton Thomas discusses the age of the glaciation which has left its traces in the Late Palaeozoic rocks of India and in various parts of the southern hemisphere. He reviews some of the considerable volume of evidence on this subject which Prof. Schuchert of Yale has so fully summarised in a recent paper (Bull. Geol. Soc. Amer., vol. 39, p. 769). Prof. Schuchert concludes that the evidence is in favour of regarding the glaciation as of “Middle Permian and probably Late Middle Permian time”. Prof. Schuchert here uses the term Middle Permian for the upper part of the Lower Permian of most authors.
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