Geology of the Lower Mitchell River. 21 



bounding Smith's flat, showed that ironstone outcrops containing 

 occasional casts of miocene fossils are present, but at Rose Hill 

 section itself these give place to calcareous clays containing 

 unaltered miocene shells, which recall the rich fossiliferous beds 

 at Jemmy's Point, Lake Bunga, and other places on the Gipps- 

 land Lakes. Individual examples of some species are very 

 common, amongst which may be mentioned, Chione subroborata, 

 C. propinqua, Tylospira coronata, Trigonia acuticostata, Ostrea 

 arenicola, Olivella nymphalis, Turritella tristira, Tellina aequila- 

 tera, Corbula ephamilla. In all 85 species were collected, a list 

 of which is given below. Immediately underlying the miocene 

 marls there is the typical eocene limestone of the area, which was 

 here evidently an eroded surface when the later beds were 

 deposited upon it. The full section (Fig. 3) from the summit of 

 the terrace to the flat level is : — 



Clay 



Conglomerate, with ferruginous cement - 

 Clay .-----.. 

 Clay and soft limestone, with miocene shells - 

 Marls with miocene shells - . - - 

 Nodules of limestone, with eocene shells 

 Calciferous rock, with eocene fossils 

 Limestone ------- 



Total - - - 75 feet. 



The eocene limestones continuously outcrop at the base of the 

 hills bounding the loop, except where the river trends northerly, 

 or between the B.R.C. Hotel a;nd Radford's. For this distance 

 only stratified drift is to be seen, whence it may be inferred that 

 a channel of considerable width was there cut through the eroded 

 limestone. Possibly the channel extended across in the direction 

 of McLeod's morass. 



Fossils from Rose Hill. 



Ringicula tatei, Cossmann Bathytoma pritchardi, Tate 



Bullinella cixneopsis, Cossmann Bathytoma sp.* 



Bullinella aratula, Cossmann Bathyt<5ma, n. sp.* 



Terebra sp.* Pleurotoma, n. sp. 



Conus sp. (much worn) Surcula sp.* 



