398 



Charles Fenner 



VI.— Progressive Physiography of the Area. 



At least three of the great defonnative movements that liave 

 affected this area have left very definite traces in the folded strata 

 of the various ages. These are shown in Fig. 12. The lowest of the 

 three diagrams represents the intense crumpling and faulting under- 

 gone by the upper ordovician, as seen on a small scale in the face of 

 the phosphate mine near Mansfield. Howitti has mapped the strike 

 of these rocks as trending N.W.-S.E. The central diagram is an 

 ideal section through the Loyola hills, where the folding, though 

 steep, is less severe than in the ordovician. The strike is regularly 

 N.W.-S.E. The topmost of the three figures represents a long, low 

 fold in the lower carb., as seen in section on the Broken River at 

 Nillahcootie. The folding in these Battery beds is generally very 

 slight; although there is much deviation, the general dip is. as 

 stated by Dunn,2 gently S.W. This gives a third N.W.-S.E. strike. 



LOWER c/saB. 



OKPOVIC J AN 



Vxg. 12.--St'Ctioiis slidwing tlui comparative folding of 

 strata of different ages. 



1 Report on Phosphate of Alumina Berts near Mansfield, Rec. Geo. .Siir. Victoria I, t, UXKi. 

 •2 Reports of .Mininjj Registrars. Dec, 18S9, p. 69. 



