442 GLANCE AT THE GEOLOGY OF 



much saturated with silica, that it will scarcely 

 effervesce when treated with hydrochloric acid. 



The depth of the vein the overlookers of the 

 mine did not agree upon, for one stated that he 

 thought he had reached the bottom of it, and the 

 other stated that the bottom had not yet been 

 found. Both, however, agreed in stating, that 

 iron ore had been proved in some mines to extend 

 seventy yards in depth, without ascertaining its 

 lowest limit. 



Near to the last described mine is another open 

 work, in a valley or fissure of limestone, known 

 by the name of Whitrigg. In its direction, 

 character, and other particulars, it so much 

 resembles the one at Lindal Moor, that it will 

 be unnecessary to give a further description. 



The surface Till in this neighbourhood is of a 

 dirty yellow colour, and not of the red colour so 

 prevalent further south. 



At Cross Gates, on the road leading from 

 Dalton to Kirkby Ireleth, I observed a small 

 open working, belonging to Mr. Alison, pre- 

 viously alluded to. In this work, probably thirty 



