60 REl^ORT OF THE MEETINGS FOR 1896 



the Granite appears on the N.W. side of the stream, in the 

 form, of a Conglomerate bed, dipping N.W. by W. at high 

 angles. In some places it is much decomposed. Porphyry 

 appears in the bed of the stream and on the S.E. side, of the 

 ordinary reddish variety. It contains (near the Granite) a 

 vein of Heavy Spar with Green Carbonate of Copper, running 

 nearly N.N.W. The stormy state of the weather compelled 

 me to stop my observations on this interesting locality, which 

 well deserves a most careful examination. 



Snail's Cleugh Greywacke vertical, strike W.N.W., 76° 

 to 77" a deep rent right across the strata running N.N.E. 

 to S.S.W. It varies from 2^ to S feet wide and is exposed 

 to a depth of 12 or 16 feet, the burn running in the bottom 

 of it and forming some deep pools. The sides correspond 

 exactly, dipping to E.S.E. at angles of about 80. ** Two large 

 blocks of stone are seen plugged into it and perhaps have been 

 the means of keeping the sides apart. The wearing effect 

 of the water here appears to have been very trifling. The 

 crack would probably at one time be filled with detrital 

 matter which has since been washed out. 



In Kiugside burn and from Mayshiel down to the lower 

 part of Kellburn little or no rock is exposed, there being a 

 deposit of clay of considerable tliickness, probably of ancient 

 lacustrine origin. 



Mr Darling (Priestlaw), informs me that at ' Goudie Heugh,' 

 a spot on the Fassney situated a little above the junction of 

 Kilpallot burn, large plates of Mica were found some years 

 ago. The place is now built up. 



From the top of Priestlaw hill, the White Nick bears N. 

 25° W., Largo Law N.N.W. and the tops of Mainslaughter 

 Law, Dirrington Law, and the Great Cheviot, S.S.E. exactly. 

 Priestlaw hill consists of MetamoriJiic Greywacke elevated by 

 Granite, which appears on the N.E. declivity of the hill rather 

 more than half-way down. Spartleton hill is precisely similar 

 in constitution, the Granite forming the inferior eminences on 

 its S.W. declivity up to about one-third of its height above the 

 Whitadder. The granitic mass is thus very nearly bisected by 

 the course of the river. In a quarry behind Priestlaw house 

 the Granite is very incoherent, crumbling readily into a coarse 

 sand. Opposite Johnscleugh is a stratum of Conglomerate 

 (Greywacke) of a very interesting nature. It consists of large 



