107 



are first met with, the drift which occurs at from 350 to 420 

 feet above the sea-level is of great extent, and very varied in 

 character; but perhaps the greatest thickness of drift is at, 

 and near, the Mickleton Tunnel, the summit of which is at an 

 elevation of about 490 feet. 



10. That at Batsford, and Compton Scorpion, on either side 

 of the valley near Ebrington, there appears to be a clearly 

 defined line of Gravel running up to the Marlstone terrace, and 

 reaching an altitude of 605 to 612 feet. 



11. That the highest ground where the N.D. Pebbles are 

 found, is at an elevation about 700 to 750 feet — at Stow; 

 near the 76th milestone from London south of Long Compton, 

 and looking towards that village ; near to Chipping Norton ; 

 and on the road leading to Whichford. 



From the presence of N.D. Gravel in the neighbotu-hood of 

 Stow, above Long Compton, Whichford, and Chipping Norton, 

 I was anxious to ascertain how far it extended over the entire 

 Cotteswold range. The red marks on the map shew it at 

 Northleach, Bibury, the neighbourhood of Cirencester, and a 

 more diligent search would doubtless diminish the part left 

 white, as we know that it is traced to the S.W., just beyond 

 the point the map takes in; and I am indebted to Mr. G. 

 Platne, of Nails worth, who has enabled me to continue it 

 considerably further to the S. for some Quartz Pebbles, which 

 were found at a height of about 700 feet, in the clayey partings 

 in a great Oolite quarry at Woodchester Park Farm, near 

 Nympsfield, which the section on the next page represents. 



The following sketch of the quarry was made for me by 

 Mr. Platne. The quarryman from whom Mr. Platne obtained 

 the Pebbles informed him " in only one parting were they found, 

 and they were stuck all over the Clay, that is to say, when the 

 stone was removed from one side of the seam of Clay, the 

 Pebbles appeared scattered over the vertical side of the seam 

 exposed to view." When I visited the quarry with Mr. Platne, 

 we failed to find any, but the partings, or openings, reminded 

 me much of the cylindrical perforations in Calcareous Strata, 

 referred to, and explained so ably by Mr. Pkestwich, as being 



