60 CHANNELS AND GLENS OF AYRSHIRE. 



on the Guelt Water, counting from its mouth, is probably about 

 the middle of it. At parts the Glenmore shows rock on its west 

 side, and drift on its east, where the old glen has been breached 

 by the present stream. 



At the Cubs, the Glenmore has again left the old valley and 

 cuts for a considerable distance and depth through trap, forming 

 the beautiful Cubs Glen, where — in very dry weather — a few rare 

 plants may be gathered, it being quite impassable, from the 

 steepness of its rocky walls, at other times. A large block of 

 impure limestone is seen imbedded in the trap, and a small patch 

 of sandstone is hitched up amongst it in the glen. The stratified 

 rocks overlying the trap at the head of the glen afford a small 

 object lesson in contact metamorphism, and clearly demonstrate 

 the intrusive character of the trap. It has a " Wallace Cave." 



Below Wallaceton the water has formed a high cliff of trap by 

 cutting sideways into it, the present valley having been widened 

 out of the drift-series from below Barlonachan. Before it joins 

 the Bellow it again cuts through rock, the old channel being 

 evidently to the south-west of Cubs Glen and the last mentioned 

 rock-cutting. 



Bellow Water. — Before the Bellow joins the Glenmore it 

 emerges from a deep rocky gorge called Bellow Path. The old 

 channel may be to the west of this, at least towards the east 

 rock is seen rising to the surface for a considerable distance. It 

 was at Bellow Mill near the junction of the two streams that 

 Murdoch made his famous experiments on the Lugar blacks, a 

 variety of very tough carbonaceous shale, which led to his discovery 

 of coal-gas. 



Lugar Water. — The junction of the Glenmore and the Bellow 

 forms the Lugar, the latter for the first mile of its course flowing 

 pretty much in the line of the old valley; but, in the neighbourhood 

 of Roadinghead, it makes a few picturesque windings, not in the 

 manner rivers generally do, in alluvial flats, but through a deep 

 rocky glen, well covered with trees, the centre of the old drift-filled 

 valley being evidently further to the south, perhaps running from 

 near Logan House (where the famous laird of that ilk lived) in 

 the direction of the south of Cumnock Town. Between Cumnock 

 and Barturk, below Ochiltree, the Lugar keeps almost entirely to 

 the old valley and has made many scaurs in the drift, some of 



