On Metallic Minerals, 362 



J 



nearly horizontal. Where the older rocks come in, the 

 surface is strongly undulated, sometimes rising in mam- 

 ellary masses of bare rock, at others in higher projections, 

 but almost always of a rounded form. 



Such is a description of a few of the features of this part 

 of the Upper Province, merely intended as introductory to 

 a more ample detail of the rocks and minerals in the neigh- 

 bourhood of the Marmora works, to which 1 now return. 



The Marmora works have been described as being seated 

 on the left bank of the Marmora river, about thirty miles 

 by land from the mouth of the Trent. The road between 

 these two J) laces runs, for much the greater portion of it, 

 if not entirely, over the transition limestone which has 

 been described. 



This limestone in general is tolerably well concealed 

 by a soil, which, in most instances, affords good farms. 

 — As the works arc approached the soil becomes gradually 

 more scanty and the dough white surfaces of tabular masses 

 of limestone frerpiently present themselves to view. — 

 When the visitor approaches within sight of the works little 

 besides a pavement of the same is beneath him. These 

 exposed masses separated from one another by small cross 

 fisHures are split and corrugated, and have much the same 

 appearance that fine wheaten dough would have if its 

 surfdce were cut and cross cut with an axe or wedge. — 

 These appearances,* probably the result of frost, are 

 cliaraeterislic of much of the limestone of the district, and 

 may be seen to great advantage near Kingston. 



The limestone immediately at the >vorks forms three 



* Hm^M inarkinKi on the tnrfaceof the linieilonc likp the impreuioniof 

 c ^trc iioi iiiicuiiiiiiuii ill ilir viciuitjr of tkiiiKston, (bey niuy with 



!>'' ' j Im: atlribiilfj lu fiukt hIso. 



