186 THE GEOLOGY OF THE WICK EOCKS VALLEY. 



I may next draw attention to the quarry just beyond tlie 

 cottages, between them and the rolling mills, now used for 

 grinding the ochre obtained from the Trias of the neigh- 

 bourhood. Working from above downward, there are first 

 about 35 feet of dark bluish-grey limestone, oolitic above, 

 then highly bituminous. Cyatliopliyllum occurs here. 

 This is followed by 2\ feet of grit, and then 14|- inches 

 of red and grey marly slate. Then come twelve feet of 

 strong dense grit, iron-stained along the joints, and this is 

 followed by a thin coal-seam a foot or less in thickness. 

 Beneath this is broken faulty-looking rock in which is an 

 old adit 15 yards long — a bit of the " old men's " work. 

 A little lower down there are a few feet of thin carbon- 

 aceous and sandy beds with thin bedded grits. These 

 are the last sandy or gritty beds visible. Near the dam for 

 the mill strong oolitic limestones are found, with Cyatlio- 

 phyllum and Producta, They are clearly Upper Lime- 

 stone. The junction of Upper Transition Beds and Upper 

 Limestone may be placed at the mill. There is no sign of a 

 fault. 



The occurrence of the thin coal-seam in the Upper Transi- 

 tion Beds, within 50 or 60 feet at most of the Upper Lime- 

 stone, is worthy of note. 



The beds have a fairly uniform dip of 55° W. The thick- 

 ness of the Upper Transition Beds may thus be estimated 

 with approximate accuracy at 600 feet. 



On either side of the pond, which is dammed back for the 

 mill, there is solid limestone, which is being worked in large 

 quarries on both sides of the stream along the strike of the 

 beds. 



If Ave follow on the right hand side of the valley, still 

 working up stream, we can scarcely fail to notice at the 

 point indicated on the map the sudden incoming again of 



