V.—Additional Note on the Discovert of Bos Primigenius in the Lower Boulder-Clay, at Crofthead, Near Glasgow

Extract

In my former note on the discovery of Bos primigenius in the Lower Boulder-clay, I stated that there was some “slight twisting and confusion” of the stratified deposits below the superincumbent Boulder-clay, which might have been caused by the pressure of glacier-ice. As the crumpling of sandi clay, and gravel, below Till, is by no means uncommon, and has frequently been described, I did not think it worth while at the time to give any drawing of the contortions exposed in the new railway cutting. But some geological friends having asked me about the character of these crumplings, it may not be out of place if I now add a few particulars. "When my former note was written the disturbed portions of the stratified deposits were not very well exposed, and consequently I did not in my communication lay much stress upon their occurrence, although I had little doubt as to their origin. Upon visiting the section some weeks later, however, I found the crumplings well displayed. In October last I saw them again, in company with my brother, Mr. A. Geikie. By that time the section had been still better developed, and the annexed sketch of a portion of the crumpled clays was made.