T. M. READE ON RIPPLE-MARKS IN DRIFT. 269 
of the paper. On the east coast of Norfolk ripple-marks were of 
common occurrence in drift deposits. 
Dr. Woopwarp, on behalf of Prof. Lapworth, suggested that 
these were not all true ripple-marks, but due to pressure, especially 
in the example adduced at Tranmere, where the drift sands were 
faulted close by. 
Prof. T. Rurrrr Jonzs thought that the facts observed by the 
author at Ketley might very well indicate ripple-marks, and that 
ripple-marks and the effects of pressure could hardly be mistaken 
one for the other. He thought that it was just as interesting to 
find ripple-marks in the drift on the west as on the east coast. 
Mr. LampiueH corroborated the remarks of Mr. Clement Reid 
with regard to the common occurrence of ripple-marks in the drifts 
of the Yorkshire coast. 
The Presipent suggested that the idea which Mr. Mellard Reade 
wished to convey was, that if the phenomena observed by him were 
ripple-marks, they could hardly have survived the passage of land- 
ice over the district, as implied by extreme glacial theories. 
> = * 
