338 Transactions. 



There is no apparent unconformity here with the underlying limestone. 



Between the two limestone gorges of the Porter these beds are bent 

 up into a .syncline in sympathy with the underlying limestones. Starting 

 from the fall of rocks and continuing up-stream, we have the following 

 sequence, the first part in ascending order, and when the other limb of the 

 svncline is reached with the beds in descending order :— 



Limestone. 



Coarse-shell bed, about 2 ft. thick. 



Finer-shell and sandy bed, about 5 ft. 



Sands, rusty brown, inclined at times to grey, 100 ft. thick, strik- 

 ing N.N.W. 



Sands, with bands of calcareous concretionary sands and shells, 

 40 ft. thick. 



Sands, 35 ft. 



Struthiolaria bed. 4 ft. thick, strike N.N.W., dipping S.S.W. 20°. 

 Other shells are included besides the Struthiolaria, but this genus 

 is dominant. 



Yellow ochreous sand, 80 ft. 



Sandy shale, 12 ft. 



Lignite, 2 ft. 



Sandy shale, 120 ft. thick, bent into a syncline. 



White sand, 2 it. 



Sandy shale, 6 ft. ; white sands, 5 ft. 



Sandy shale, 150 ft. 



Ochreous brown sand, 20 ft. 



Greenish sand, 15 ft. 



White sand, greenish where it weathers, but stained ochreous brown 

 in places, with hard concretionary sandstone band in the middle ; 

 total thickness, 25 ft. 



Calcareous sandstone and concretionary bands with shells (Struthio- 

 laria beds ?), 1 ft., striking N.E., dipping N.W. 45°. 



Greenish-grey sands, 30 ft. (?). 



Broken-shell beds. 



Sands, thickness 130 ft. (?). There is some doubt about these beds, 

 owing to the covering of soil. 



Limestone, 7 ft. thick ; strike, E. by N. ; dip, N. by W. 55°. 

 In all this section there is no evidence of unconformity. 

 The next important section is that occurring in the upper part of White- 

 water Creek above the limestone. In a small tributary to the north an 

 excellent show of sections is displayed. Working down this, the following 

 beds are exposed : — 



Sandy shales. 



Sandy beds. 



Shell beds containing Struthiolaria. 



Sandy beds with layers of shells in their lower portions. 



Sandy beds with concretionary layers containing shell-remains, largely 

 Macrocallista, the same as in the Thomas and Broken Kivers at 

 this horizon. 



Sandy shell beds. 



Limestone. 

 These beds have a strike to the north, and dip west at an angle of 20° 

 In Moth Creek, a tributary of the Thomas coming in on the west side 

 of Castle Hill, there occur sandy shales, blue greensands, and shales with 



