Ill 



ME. E. W. BmNEY ON A MINERAL VEIN 



is a Stone quarry, known by the name of Grimshaw Delph, 

 in which occurs the vein of sulphate of barytes, which it is 

 my intention to describe on the present occasion. 



This quarry is situate in a very disturbed district, as is 

 evident from the fact of a rock, having all the characters of 

 the lower new red sandstone, being found on the S.W. side 

 of the Delph, in contact with the rock quarried, which is the 

 rough rock before alluded to, one of the sandstones of the 

 lower coal field. The fault in which the red sandstone lies 

 is the same as that seen in the bfOok course, below Mr. 

 Stocks' colliery, near Billinge Beacon, running from S.E. to 

 N.W., and thus bringing in the Rainford coal field. The 

 veins of barytes all run at right angles to the direction of 

 this great fault. 



The Grimshaw Delph has been quarried for many years, 

 and is of great extent. It consists of a very hard sandstone, 

 composed of sharp grains, identical with that at Parbold; 

 dipping to the N.N.W. at an angle of 16", and covered by 

 a deposit of six or eight feet of brownish coloured till. The 

 stone is much harder than that of any quarry of the same 

 bed met with in the county, and forms a good material for 

 making and repairing roads. On two occasions, accom- 

 panied by his friend Mr. Robert Harkness, the author has 

 had opportunities of examining it. 



The main vein or fis- 

 sure which intersects the 

 quarry, is found on the 

 north-eastern side, where 

 the excavation is about 

 ten yards deep. It is 

 nearly vertical; running 

 from W.S.W., to E.N.E., 

 proceeding from the great 

 N.W. and S.E. fault be- 

 fore alluded to, and having a course nearly at right angles 



