354 J. H. Cooke — Geological Notes on Oozo. 



gerina Limestone of the depressed district, across the line of fault 

 marked by the Lower Limestone, to the Globigerina above it. 



On the right-hand side of the pathway, that runs through this 

 elevated region, and at a distance of about a quarter of a mile from 

 St. Georgio, another remnant of the deposit may be seen. 



Passing down the hill again, and crossing to the northern slopes 

 of the valley, another development of similar accumulations, of even 

 greater extent, w^ill be met with. 



These beds, however, present many striking points of dissimilarity 

 to those on the opposite side of the valley. Like the deposits on the 

 southern slope, they extend in an east and west direction, and lie 

 unconformably on the Globigerina Limestone. They occupy a kind 

 of platform on the hill-side, and towards the lower boundary they 

 break off and form an escarpment of from 6 to 8 feet in height. 

 Approaching the valley from the Kaura Gorge, an excellent section 

 of the bed is to be met with about 150 yards down the slope. Its 

 "ace forms the northern boundary of a field, a large portion of the 

 oil of which has, apparently, been derived from the deposit. This 

 section shows the bed to be made up of a number of layers, each 

 of which differs in a most marked manner from those above and 

 below it. 



It will be seen, therefore, that, though agreeing in some respects 

 with the formation on the opposite side of the valley, there are also 

 many important points of dissimilarity. 



The most striking of these may be seen in the following table of 

 comparison. 



Deposit on the Southeen Side. Deposit on the Northern Side. 



a. Boulders are comparatively small, a. Boulders are large, and are dis- 



and are interspersed throughout the tributed in well-defined layers. 



bed. b. The loam is overlain by alternating 



b. The loam is overlain by a single layers of pebbles, boulders, lime- 



layer of limestone. stone and stalagmite. 



c. Mammalian remains, c. No Mammalian remains. 



The distinct evidences of stratification that are apparent in every 

 part of the beds offer unequivocal proofs of their aqueous origin ; 

 and that is a conclusion that is still further borne out by the rounded 

 and otlierwise water-worn state of the pebbles that occur so plenti- 

 fully in them. The finer materials, the pebbles, the shells, and 

 the Mammalian remains have all apparently been collected from the 

 surface of the surrounding country by the agencies of freshets, and 

 inundations of a similar character. 



From the evidences afforded by the nature and position of the 

 various portions of the deposits, it would seem as though the surface 

 configuration of the district has undergone changes of a marked 

 description since these beds were formed. Thus the occurrence of 

 patches of the bed both above and below the line of fault would 

 seem to indicate that their deposition must have taken place ante- 

 cedent to the downthrow to which the now-existing valley owes 

 its origin. 



What the immediate causes were that gave rise to the flood- waters, 



