4 Proceedings of the Royal Society of VictoHa. 



The Broken River, for a considerable distance in this 

 neighbourhood, runs apj^roxiraately from east to west, 

 while the strata dip at an Mngle of from 4° to 8° to the 

 south-west, the general inclination of the land surface on the 

 north, as of the strata, from the tops of the Hat Hill, Table 

 Top, &c., six miles distant, except where denuded and 

 scooped out to form the deep valleys which can often be 

 observed, is toward the river. 



The western boundary of these rocks, north of the Broken 

 River, is approximately along the line ot the Blue Range 

 Creek, where they abut on, and appear to overlap, the 

 srranite rocks which culminate in the Blue Rano'es. 



The strata on the south side of the river continue to dip, 

 wherever seen, in the same direction, and at about the same 

 anofle as on the north side. The land surface o-enerallv, 

 however, rises slowly from the river for a few miles, till it 

 reaches the watershed of the Delatite River and its tribu- 

 taries, not, however, without an occasional hill, evidently 

 the remains of an extensive and almost horizontal area, 

 which the denuding agency of the receding waters failed to 

 remove. By far the most conspicuous of such, is the Battery 

 Hill before referred to, and several others on the north of 

 Broken River, including the Hat Hill, Table Top, &c. The 

 small hill, also on the north of the Broken River, and to the 

 west of Bridge Creek, visited by Mr. Ci'esswell, is one 

 example ; and the somewhat larger hill, a mile further east, 

 close to the river, forming a part of Mr. P. O'Halloran's and 

 Mr. Mitchell's properties, and containing an area of about 

 ane hundred and twenty acres, is another. It is with these 

 iwo last-named elevations, and chiefly the latter, that this 

 paper is concerned, as it was this place which appeared to 

 me to present the greatest facilities for ascertaining the 

 succession of the various strata, and obtaining fossils. 



Our camp was fixed at 11 (Plate 1) on the south side of 

 the river, so as to be near at hand. The wisdom of this 

 was soon apparent, as we were thus enabled to use all 

 available daylight for our work. For though the employes 

 worked but eight hours per day, my investigations occupied 

 me nearly double that time, daylight being supplemented by 

 the lamp, for some of the work that had to be done. 



If we start from the point at which the line Y Y bisects 

 the hill on its western side, the site of No. 1 in sketch, 

 indicating the first excavation, and look south-west, we at 

 once notice a steep embankment, which slopes some thirty 



