THE GEOLOGY OF THE WICK ROCKS VALLEY. 187 



the Millstone Grit. This is due to a fault whicli runs nearly- 

 North and South (N. 10° W. to S. 10° E.). The limestone 

 seems to dip nearly due W. The faulted-in Millstone Grit 

 N. 70° W. The fault is undoubtedly a reversed or thrust 

 fault, since at the upper part of the northern slope of the 

 valley the limestone is thrust further East than it is further 

 down the slope. 



The Millstone Grit thus introduced may be followed up 

 the stream on the southern (right hand) slope of the valley 

 and preserves a dip of 65° in the direction N. 70^ W. It is 

 followed in due succession by calcareous beds and well- 

 marked sandy limestones, indicating the incoming of the 

 Upper Transition Beds which retain the same dip to 

 N. 70° W. 



Suddenly, however, we come upon strong grits, with 

 pebble beds of milky quartz with quite a different dip, 

 viz., 75°-80° in the direction S. 10° W. These dips are not 

 found in an isolated patch of rock, but are seen on both 

 sides of the stream near Cleeve Bridge. The incoming of 

 Millstone -Grit again, and that with a dip in quite a different 

 direction, can only be accounted for by a second fault, which, 

 according to my estimate, runs N. 30° W. to S. 30° E. 



Beyond Cleeve Bridge the Palaeozoic beds are covered by 

 Trias. 



The geologist, instead of retracing his steps down the 

 valley, may take the little path from Cleeve Bridge to the 

 Wick E/Ocks quarry, where he will see the Upper Limestone 

 (in which there are strings and veinlets of Galena) well 

 exposed. 



At the points marked o c on the map, pits are being sunk 

 in the Trias for ochre, which is being ground by Mr. Phipps 



at the Wick rolling mills. At (o cV for example, a bed of 



