730 



MISS C. A. RAISIN ON THE 



shore of the side estuary, being possibly part of an interbanded 

 series, the remains of which to the south still occur along the oppo- 

 site shore. The mica-schist strikes in the common direction of N. 

 of E., and has often a high northerly dip ; it is mostly nearly vertical 

 and much folded. At places the dip varies, and the beds have a 

 squeezed look, rather like those in the mica-schistpoint up the estuary. 

 From the uniform direction of strike, the mica-schist is cut very 

 obliquely by the shore, which trends eastwards from Scoble ; but, 

 bounding a small inlet in this shore, a cliff occurs, which cuts across 

 the beds ; although much weathered and overgrown, we can see 

 that they consist of similar mica-schist. In this side estuary, the 

 southern shore, passing Portlemouth Parsonage, exposes interband- 

 ings, some of only a few feet, some thicker. The rather massive 

 chlorite-schist, which is quarried near the old limekiln, is of such 

 small extent that I place it and also the chlorite-schist of the cliff 

 north of Portlemouth Ferry as a subordinate part of this series. 

 The dips of the latter mass of chlorite-schist rather vary, but the 

 rocks of this series have a general dip to the W. of N '. 



3. Mica-Scliist {of Portlemouth Ferry). — They would thus probably 

 overlie the large mass of mica-schist found along the shore to Portle- 

 mouth Ferry and beyond, which has previously been described. 

 Similarly, this interbanded series, dipping northerly, seems along 

 the estuary shores to overlie mica-schist, about a quarter of a mile 

 north-west of Good Shelter. The schist, with one rolling over, dips 

 northerly, although towards Waterhead it seems to change, but is 

 not well exposed. The mica-schist is also traceable inland near 

 Portlemouth church, and at places along the lanes south of Waterhead 

 estuary, notably near Hawkshead. The strike here is well marked, 

 still to about 10° N. of E., and the dip is about 70° to W. of N. 



Estuary shores southward of South Pool. — Passing now to expo- 

 sures further eastward, we have rather more difficulty in deciding 

 their relations. First, in completing our survey of the estuary shores, 

 we find along the arm descending from South Pool, south of the 

 phyllites already noted there, exposures of chlorite- or interbanded 

 schists ; these extend southwards, and form the point east of Wester- 

 comb, and also the cliffs of the opposite shore north and south of 

 Gullet. The beds are partly normal chlorite-schist, such as those 

 quarried opposite Gullet, partly mica- and micaceo-chloritic bands, 

 resembling those obtained from the main estuary. 



Parts of these beds are rather out of the direction of the strike of 

 chlorite-schist from the westward ; but this, I think, might be from 

 a faulting of the district. The slickensided look in the mica-schist 

 of the point opposite Westercomb, the changed, variable and high 

 dips of the Gullet beds and those opposite, all seem to support the 

 idea of faults having broken the country near. Such faults may 

 have partly determined the lines of the estuary. If we suppose 

 these chloritic beds to be equivalents of the Scoble-Point rocks, and 

 to have been partly displaced to the southward, then there is some 

 difficulty in accounting for the mica-schist, which forms the cliffs 

 nearly all the way from a little south of Gullet around the projecting 



