2U 



Notes on Post Tertiary Strata 



place, indeed, there are shell-beds at only half this height, 

 and therefore quite within the reach of flood waters. The 

 heights to which floods have risen are known to residents 

 by marks on trees, &c., and some of these, which were shown 

 to me, must be fully 40 feet above the bed of the stream. 



The hill, and the other shell-banks in its vicinity, are on 

 the margin of an irregular terrace, which continues all along 

 the river in this part of its course, at a height of from 30 to 

 60 feet above its bed. In the terrace there are occasional 

 mounds or banks, but it usually forms extensive flats. 

 Through these the river winds in such a tortuous manner 

 that, to go in a straight line from bank to bank of the gorge, 

 which is sometimes nearly two miles in width, the stream 

 might have to be crossed two or three times. 



DRIFT SAND 



,^y5 L 



Sketch Section 



Left Bank of Glenelg Goege at Eoscoe's. 



It is noticeable that the river frequently hugs one bank 

 for some distance, and then crosses over to the other, so that 

 the flats succeed one another on opposite sides of it. The 

 same thing was observed by Professor Tate as a feature of 

 the Murray*. In some other respects the two river gorges- 

 resemble each other, allowing for difference of size. 



Transactions Royal Society of South Australia, 1884. 



