METAMORPHlC ROCKS OF SOUTH DEVON". 



731 



point and up the estuary branch to Waterhead. It seemed possible, 

 however, that the rocks had been thrust northward and that the 

 mica-schist might belong to the mass occurring at Good Shelter, 

 stretching westward, and probably, as we shall describe, eastward also. 



The Point, which projects where the two branches of the estuary 

 join, is occupied by mica-schist much folded, varying in dip, often 

 nearly vertical, and so crashed and slickensided that small frag- 

 ments have quite a phyllite look ; indeed they split up into thin 

 folia, so as to be almost describable as " papery." About one third 

 the distance from the point to Waterhead along the northern shore, 

 these schists pass into mica-schist of more usual character, folded 

 and gnarled, but dipping steadily to the W. of N., with one inter- 

 banding of chloritic beds. 



Inland, eastward of South Pool. — Eastward of South-Pool estuary, 

 we can trace the beds which are successively cut out by the faulted 

 junction, and which probably form a downward succession. With 

 the exception of the chlorite-schist which occurs first, whose dis- 

 turbance we may possibly correlate with that of the beds near 

 Gullet, these inland exposures show a general dip to the N. or 

 W. of N. Near Wilton and eastward of it, chlorite,-schist occurs 

 exposed by roadsides and in several quarries; the dip is not altogether 

 uniform, especially at places approaching the boundary line, but is 

 partly in the general northerly direction. Next, underlying, is a 

 mass of mica-schist cropping out around Chivelstone, at and north- 

 ward of South Allington, and cut by the main fault at Killington, 

 having a uniform strike and northerly dip. There is evidence of 

 chlorite-bands occurring at places in the mica-schist. I would ven- 

 ture to suggest that, possibly, this mass may be a continuation of the 

 Portlemouth-Perry schist. Underlying the mica-schist, chlorite- 

 schist again occurs (including some mica-bands) at Bickerton, and 

 is quarried on the south of the valley to the eastward. 



Summing up the succession in this northern area we seem to 

 have, in descending order, as shown in the annexed section (fig. 4), 

 which is only diagrammatic : — 



1. (a) Interbanded series, found south of Halwell Wood, and on 

 the opposite shore, also near Lower Batson. 



(b) A thick band of chlorite-schist, at Scoble and at Snapes Point, 

 west of Batson inlet and extending beneath Salcombe. On the coast 

 this might be represented by the Westercomb-Point and Gullet rocks 

 and by those near Wilton and eastwards, but I rather prefer to place 

 these with the interbanded series, 2 (b). 



2. (a) Mica-schist north of the side estuary. 



(b) Interbanded series (including one or more marked masses of 

 chlorite-schist) remaining on the southern shore of the side estuary, 

 doubtfully including the Westercomb, Gullet, and Wilton rocks. 



3. Mica-schist of Portlemouth Perry and of inland exposures 

 occurring near Good Shelter and Waterhead, possibly including the 

 rocks of the point south of Gullet, and probably continued in the 

 Chivelstone, South Allington, and Killington exposures. 



4. Chlorite-schist of Bickerton, which I have not attempted to 



