205 



5°, and make a more important feature in the cea cliffs. 

 The beds now have the form of soft, yellowish, sandy clays, 

 and continue to "Sliding Rocks," already described (see 

 page 201). 



The Miocene beds continue to outcrop at intervals in 

 the same direction. Near Muloowurtie Point they are so 

 highly glauconitic that on the flat they have the appearance 

 of a green tablecloth. At Hart's Mine, on the coast, they 

 rest immediately on the Pre-Cambrian complex, the divisional 

 line being a brecciated zone in which fragments of the base- 

 ment rock are included in the lower portions of the Tertiary 

 beds. They are also seen at Rocky Point, 4 miles to the 

 southward of Hart's Mine, where they underlie the fresh- 

 water consolidated sands and pass below sea level. 



PLEISTOCENE. 



Not the least interesting of the geological features of 

 this district is the occurrence of certain freshwater deposits 

 that are of considerable antiquity. They occur as surface 

 features in two positions. One of these is along the escarp- 

 ment of the coastal ridge, near Ardrossan, and the other 

 occurs on the beach or exposed in the sea cliffs. They repre- 

 sent three distinct lithological types, and probably belong to 

 three distinct stages in relation to geological occurrence. The 

 oldest of these are highly siliceous sands and fine gravels 

 occurring at high levels. The intermediate in age consist 

 of more or less consolidated sands that occur at a few places 

 in the sea cliffs, and the newest in variegated and mottled 

 sandy-clay typically developed in the cliffs near Ardrossan. 



(a) THE OLDER SERIES. 



1. The high-level occurrences of these beds follow a lineal 

 course skirting the eastern flanks of the coastal ridge (pi. 

 xxii.) from near Parara to Mr. Dinham's farm, a distance 

 of 3 miles, the beds being about half a mile distant from 

 the sea in the former case and 2 miles in the latter. Their 

 most southerly exposure (pi. xxiii.) is on the northern side 

 of the district road that runs west from Parara sheep station, 

 past the house on Cliff's farm (late Naughton's). In this 

 locality three outcrops of the beds occur at different levels 

 (fig. 2), showing a vertical range in elevation of about 100 

 feet. Similar outcrops occur at intervals along the face of 

 the ridge (pis. xxiv. and xxv.), some of which are several 

 acres in extent, and pass upwards to the edge of the plateau 

 on cultivated ground, giving a width of about one-third of 

 a mile. Some large boulders of this rock can be seen on the 



