30 Proceedings of the Royal Society of Victoria. 



Amongst the ironstone strata of the amphitheatre banks, we 

 picked up several unaltered oyster shells similar to tliose in the 

 river cliffs. In occasional blocks, also, we found that the substi- 

 tution of the iron oxide for limestone was partial and confined to 

 the outer portions of the stone. Specimens from the latter have 

 not been quoted in the list, but only those which occurred as casts 

 in fully altered rocks. For the most part, the nodules of fossil- 

 iferous ironstone crop out at a comparatively low level, but 

 some resting on the tops of the rounded hills bordering the 

 flat, and others still higher up on the eastern slope of the road 

 yielded, when broken, good fossil casts. 



Besides the exposure of the limestone on the southern cliff and 

 at the base of the low hills along the creek, there is a small 

 inlier on the I'oadside at the eastern approach to the bridge. 

 This has been quarried and a face about 35 feet high is left (see 

 Sec. Fig. 6). The rock here is much weathered and also 

 hardened superficially by redeposit of calcium carbonate, but a 

 few shells were detected in it, viz., Spondylus gaederopoides, 

 Pecten yahlensis, and P. gambierensis. 



The full section at the quarry is : — • 



Surface soil ------- 6 feet. 



Clay - . . 8 „ 



Projecting limestone layer, coated with iron- 

 stone, and containing calciferous casts 

 of fossils - - - - - - 2 ,, 



Fine sand and efflorescing salts - - - 10 ,, 

 Nodules of limestone and silt, with very 



small worn quartz pebbles - - - 9 ,, 



Total 35 feet. 



The hill on the west side of the creek leading up to, and 

 beyond Dooley's gate, is a counterpart of that on the other side, 

 except that no limestone is visible at the base. Section Fig. 6, 

 shews the strata on the western ascent, the steepness being, to 

 save space, greatly exaggerated. The alternating layers of drift 

 and soft ironstone bands occur up to the summit. The summit 

 itself, is capped with the bed of an old stream, the bottom of the 

 channel being well detiued ; the silt has been cut into, and 



