224 



basins of drainage; numerous small depressions receive the 

 drainage from the soil during the winter rains, followed by 

 the deposition of salt in summer. 



My acknowledgments are due to the Rev. J. R. Andrew, 

 of Ardrossan, who has been most assiduous in the collection 

 of specimens, and in many ways has furthered my objects ; 

 also to the Rev. J. C. Jennison and Mr. B. Cornish, of 

 Maitland; and to Mr. O. W. Thompson and Mr. Tiddy, of 

 Ardrossan, by whose»valuable aid, respectively, I was enabled 

 to visit distant places of interest. 



DESCRIPTION OF PLATES. 



Plate XIX. 



Basal Grits of Upper Cambrian, Dinham's Quarry, near 

 Ardrossan. 



Plate XX. 



Basal Grits and Conglomerate of Upper Cambrian, Winulta 

 Creek, near Public School. 



Plate XXI. 



"Sliding Rocks." Outcrops of beds of Dolomite which form 

 the lowest members of the Upper Cambrian Limestones series and 

 pass below sea level at "Sliding Rocks," situated 6| miles south of 

 Ardrossan. 



Plate XXII. 



General view of ancient River Terrace with consolidated beds 

 of alluvia forming a low scarp, facing to the sea, near Ardrossan. 



Plate XXIII. 



Group of spheroidal masses of highly siliceous and con- 

 solidated alluvia, resting on an ancient river terrace, forming a 

 coastal ridge, near Ardrossan. 



Plate XXIV. 



Silicified alluvia weathered into large irregular masses, rest- 

 ing on scarp _face of coastal range, near Ardrossan. 



