REPORTS OF COMMITTEES. 267 



of material transported, the great size of many of the erratics, and the 

 great number of ice-scratched stones which have been obtained from 

 almost every outcrop of the beds when opportunity presented itself to 

 search for them. 



II. The Newer ((?) Permo-Carboniferous) Glaciation. 



Whilst making geological observations on the older rocks of the 

 Inman Valley, a few additional notes were incidentally made of the 

 glacial phenomena in the neighborhood. These are now presented 

 in the form of a progress report, and are supplementary to those already 

 given of this highly glaciated district.^ 



The Hindmarsh Eiver valley, the Inman Eiver valley, and the 

 Back Creek are valleys of erosion cut through the glacial deposits of a 

 once much greater valley, that had its boundaries in the Hindmarsh 

 Tiers on the north-east and the Waitpinga highlands on the south- 

 west. This older valley had a width varying from three to seven miles. 

 At the time of intense cold in these latitudes the valley was filled from 

 side to side by the great Inman glacier, which, in its course northwards, 

 surmounted obstacles in its path 800ft. in height. 



Several well-marked roches-moutonnees occur as inliers of the glacial 

 sands and clays. Granite Island was probably one such, but has been 

 subsequently much weathered and broken by sea action during Tertiary 

 and Recent times. At the entrance to the Hindmarsh Valley two 

 rounded hills exhibit characteristic roche-moutonnee features. One of 

 these forms the rounded knoll on which " Adare," the residence of Mr. 

 D. H. Cudmore, is situated. The rock consists of micaceous quartaite, 

 and on its westward side numerous large granite boulders line the face, 

 some of which show 9ft. of surface near the level of the ground in which 

 they are almost concealed. In the paddock adjoining the house are 

 two granite erratics each 5ft. in length, and are associated with a group 

 of six smaller boulders. Another, but smaller, roche-moutonnee hill is 

 seen in a line with the one just described, composed of similar rock, 

 with a granite boulder, 3ft. Gin. long, perched near the top. On the 

 west side of the hill are two others, measuring respectively 3^ft. and 

 2|ft. In the south-east paddock there is a group of 20, measuring up 

 to 5ft. in length. Morainic material is seen on the saddle connecting 

 the two roche-moiitcnnee liills. 



About eight miles north-west from Victor Harbor an important 

 spur of the ranges penetrates the Inman Valley on its northern side, 

 and includes Strangway's Hill and the Inman Hill. Whether the 

 glacier passed over these highest points of the spur or not is uncertain ; 

 but there is definite evidence that it passed over a saddle near the head 

 of the Duck's Nest Creek, on the northern side of the spur (which is 

 only a few feet below its highest point) and filled up the Duck's Nest 

 Creek and the Deep Creek, which occur on its western side. The height 

 of this saddle, as given bv the aneroid, is 790ft. That the ice should 



A See Roy. Soc, S. Aus., vol. XXL, 1897, p. 61. Ibid. vol. XXII., 1898 

 p. 12. Report Aus. Asso. Ad. Science, Sydney, 1898, p. 114. Ibid. 

 Melbourne, 1901, p. 172. 



