I read Aschmann's comments with great interest, welcome the opportunity to reply to them, and wish also to add some comments I have received by letter from others.

I used the terminology of Antevs, but not his chronological framework, which is quite different from that presented tentatively by me. In fact, I feel certain that Antevs would be much rougher in his assessment than Aschmann.

My grievous remark on climate stems from ignorance and my impression that the cool periods followed the glacial advances. Among the implications of such an idea are that somehow additional precipitation in high latitudes caused the glacier to grow and this in turn somehow produces in varying degrees a cool climate locally, probably somewhat dependent upon the magnitude of the icecap. I suppose that such factors as prevailing wind direction, tracks of high and low pressure areas and positions of large bodies of water are among the variables that would have to be considered.