Plant Migration across the Millstone Grit.

Abstract

There is one marked difference in the descriptions of the Carboniferous floral succession that have been furnished by Kidston and Potonié. Kidston emphasizes the existence of an abrupt change of flora at some point within the British Millstone Grit; while Potonié claims that he can demonstrate floral continuity right across the corresponding position in Upper Silesia (U.S. of Fig. 1, p. 58). Recent work by Renier seems to show that Potonié's results apply also in Belgium.