﻿Yol. 64.] AGE IN SOUTH AFSTEALIA. 263 



Dwyka Series, in various parts of the Transvaal, Orange-River 

 Colony, and Katal, he would like to endorse all Mr. Lamplugh's 

 remarks with regard to the great and very remarkable similarity of 

 the specimens exhibited, from South Australia, with specimens which 

 might be obtained from the Dwyka Beds. 



Mr. A. E, KiTsoN said that, from personal acquaintance with the 

 Sturt-Yalley section, he was satisfied as to its glacial origin. Although 

 he believed that many of the strise were the work of ice, he did 

 not attach so much importance to them as to the general character 

 of the beds. The great disparity in size and the difference in com- 

 position of the boulders, and especially the occurrence of boulders 

 8 to 10 feet in diameter, embedded in masses of what was originally 

 mud, could not (he thought) be attributed to any other agency 

 than ice. Undoubtedly the beds had suffered much crushing, and, 

 although some of the blocks along the contact of the conglomerates 

 and quartzites might be due to dynamic agency, that would not 

 satisfactorily explain the occurrence of the big boulders that were 

 found in the lower portion of the conglomerate. 



Prof. Gaewood commented on the striking resemblances, between 

 the deposits shown in the photographs and Pleistocene and recent 

 glacial deposits in different parts of the world, and on the typical 

 glaciated appearance of many of the boulders exhibited on the table. 

 He thought that perhaps too little value had been attached by some 

 of the speakers to the evidence of glacial origin provided by the 

 scratches which these boulders exhibited ; many of these showed 

 typical glacial grooves, some of which crossed each other at right 

 angles. He did not think that these could have been impressed by 

 crush-movement, which would tend to produce parallel strise in any 

 one zone. 



In reply to Dr. Strahan he quoted a passage from Mr. Howchin's 

 paper, in which that Author commented on the absence of any 

 striated platform under the Australian ' tillite '. 



