398 



Transactions. — Geology. 



45 ft. wide, the second 18 ft., and the third about 22 ft., vary- 

 ing in depth from 2 ft. to 6 ft. The pockets are separated 

 from each other by ridges of limestone averaging 3 ft. or 4 ft. 

 wide, as shown in the following diagram : — 



Section I. 



Kiln Point : Face exposed behind old kiin. 



B. Limestone. 



A. Phosphate rock. 



The phosphate fills the pockets and rises above the level 

 of the dividing-ridge of limestone to a height varying from 3 ft. 

 to 10 ft., the greatest depth occurring at the north-east end of 

 the section. 



The phosphate rock exposed in the face of the open 

 cutting is much broken and crushed, and sometimes shows 

 slickenside surfaces. It is yellowish-brown in colour, with 

 irregular seams and patches of whitish-grey. The presence 

 of sand renders it soft and friable, and of lower grade than 

 that exposed at Discovery Point. 



At the most easterly point of the open cut masses of 

 fairly pure phosphate rock contain inclusions of basalt, occur- 

 ring in small angular or nodular fragments which are seldom 

 over 4 in. in diameter. In a deep narrow trench above the 

 open cutting the phosphate is mixed with glauconitic green- 

 sands which are said to be highly phosphatic. 



Section II. 



^^D, 



Kiln Point. A. Phosphatic greensands. 3. Phosphate rock. C. Lime- 

 stone. D. Glauconitic greensands. 



The rock-phosphate has been exposed by a long trench 

 some 12 chains north of Kiln Point, but no feature of special 

 interest is disclosed in this direction. 



At Millburn lime-quarry the surface of the Eocene lime- 





