THE 



JOURNAL OF GEOLOGY 



MAY-JUNE, iSgj 



THE LAST GREAT BALTIC GLACIER. 



In a recent number of this Journal* Dr. Keilhack criticises 

 certain views which I have been led to entertain as to the 

 glacial succession in northern Europe. He does not agree with 

 me that the great terminal moraines of the Baltic Ridge are the 

 products of a separate and independent glacial epoch. On the 

 contrary, he and his colleagues on the Royal Prussian Geological 

 Survey are persuaded that the moraines in question simply mark 

 a stage in the retreat of the third ice-sheet. In the last edition 

 of the Great Ice Age I have stated somewhat fully the evidence 

 for the conclusion which my critic now disputes, and a short 

 outline of the subject subsequently appeared in this Journal^. 



Geologists who may wish to know what my views are will, I 

 hope, take my own account of them rather than that which 

 Dr. Keilhack has presented to his readers. Doubtless the discus- 

 sion has been conducted by him in good faith and with every 

 intention of being just, but, all the same, he has not succeeded in 

 giving an accurate outline of the reasons which compelled me to 

 dissent from the opinions maintained by him and his eminent col- 

 leagues. Some of the more important evidence adduced he either 

 ignores or slurs over, while in certain other matters he has strangely 

 misunderstood and thus unwittingly misrepresents me. Having 

 carefully considered Dr. Keilhack's paper, I find that his criti- 



'Vol. V, No. 2, pp. 1 13-125. 

 ^^Vol. Ill, p. 241. 

 Vol. v., No. 4. 325 



