Baden Powell — Igneous Rocks of Charmvood Forest. 113 



The first of these consists of what might to a casual observer 

 seem merely a small heap of transported blocks in the New Eed marl, 

 but the larger blocks are deeply inbedded ; the ground falls on every 

 side from the mass : and it has the appearance of a true outbreak. 

 These masses consist entirely of a dark syenite, coarse-grained, with 

 large black crystals of hornblende. 



The other two masses occur in the adjacent wood. They are both 

 small knolls or hills, covered to the summit with the red marl, 

 sufficiently thick at all parts to bear not only wood, but trees of 

 considerable size. 



In the most northernly of these knolls, small portions of 

 rock everywhere project, consisting of a deep syenite, more closely 

 grained than the former. Some blocks also occur of a pink hue ; 

 like that of Mount Sorrel. 



Of the third mass, perhaps one half has been quarried away. 

 The section shows the red marl, covering it to the top. The nature 

 of this rock is peculiar ; at some parts the pink syenite occurs, but 

 only in thin beds, between the other portions, in variously inclined 

 positions. In some parts, but very rarely, this syenite is full of 

 glittering scales of mica, which it has been suggested to me indicate 

 the action of heat by their peculiar appearance. This is the only 

 locality in which I have found any mica ; excepting minute specks 

 of it which may be detected in some specimens from Mount Sorrel. 



The great mass of the quarry consists of a very dark, compact, 

 hard rock, largely used for road making, and esteemed by the work- 

 men the hardest in the district. Throughout many portions minute, 

 hard, and brilliant crystals are diffused. In some specimens they lie 

 in bands or veins, while the rest is destitute of them. 



At one part, in a kind of corner between two upheaved masses, a 

 portion of the same rock is seen contorted, as in the annexed sketch. 

 (Fig.l.) This dark rock, which seems unique in the district, has not, as 



Fig. 1. Contorted Rock, 

 Basil Wood. 



Fig. 2. Ground-plan of Quarry n< 

 Buddon Wood. 

 a, b, c, portions of Basaltic Dyke. 



far as I can find, been noticed. From an examination of my specimens 

 it has been described to me as, probably, a micaceous slate, altered 



