2m 



vertical slip of at least 100 feet, with the downtlirow to the 

 cast, the transverse fault between Sarah and Ragged Islands 

 being- rci)cated between Ragged Island and the main land. 



Northwest of the bridge across the cove, the conglomerate 

 sloi)es stee[)ly down to the water in one broad diagonal joint- 

 face. On the north side of the headland at the eastern end of 

 the ledge the conglomerate shows very distinctly a southerly 

 dip of 35°.^ The shore retreats here, the headland giving way 

 to a small sandy beach, at the north end of which a gray sand- 

 stone outcrops with the same dip as the conglomerate. It is 

 very evident that the sandstone is really as broad as the beach, 

 that the base of the abrupt northern face of the conglomerate 

 marks the contact of the two rocks, and that this sandstone is 

 the continuation of that forming the northern shores of Ragged 

 and Sarah Islands. Between the buildings in the northern [)art 

 of the garden is an exposure of conglomerate (see map) which is 

 stratigraphically below the sandstone : and westward on this 

 line, across Downer Avenue and east of Whiton Avenue, it 

 outcrops sufficiently to prove a bed of considerable thickness. 

 In its eastward extension this bed must, of course, pass wholly 

 to the north of the southern islands. The outer part of 

 Walton's Cove clearly corresponds to the gap between the 

 islands and the ledges parallel with their southern shores ; but 

 the inner part, influenced no doubt by the diagonal jointing of 

 the conglomerate already referred to, is oblique to the stratifi- 

 cation, and the same bed of conglomerate forms both shores. 

 South of this conglomerate, and in line with the outer part of 

 the cove, there are outcrops, as the map shows, of a purple, 

 banded slate and gray sandstone. The slate is contorted, and 

 is, doubtless, underlain as well as overlain by sandstone. The 

 dips of the slate are, of course, unreliable, but the sandstone 

 shows that the dip observed north of the conglomerate still 

 continues. South of these soft beds, and forming the south 

 shore of the cove, east of the bridge, is a third bed of con- 



I r.y misliikv the dip is iiiadu 25° on IJR' iua[i. 



