220 



MU. JUKRS-BROWNH AND PliOF. HARRISON 



tract from Hackleston's Cliffs to Codrington, it was possible for 

 coral-reefs to form against its foot, and accordingly we find narrow 

 and irregular terraces of coral-rock which may be regarded as con- 

 tinuations of the reefs elsewhere formed between 700 and 800 feet. 



Again, it is noticeable that the actual cliffs end below St. John's 

 Church at a level of about 700 feet, and that all the coral-rock 

 plateaux to the southward run in below the line of cliffs from the 

 700-feet terrace down to that which passes above Sealy Hall at 

 about 300 feet. 



Below Hackleston's Cliffs, which rise to 1000 feet above the sea, 

 the slope is covered with coral-rock down to a level of 500 feet near 

 Mount Dacres, according to levels which have been kindly commu- 

 nicated by Mr. E. Easton, C.E., E.G. 8. This slope is broken and un- 

 even, owing to the frequent landslips which have occurred by the 

 slipping of the lower reefs over the surface of the Scotland clays. 

 The annexed figure (fig. 8) will serve to illustrate what appears to be 



Fig. 8. — Section from Edrfediff through the cliff to the coast. 



Edge- 

 Koad. cliS. 





HORJZ ,SCI\LE 

 V^ffT . SC/\LE ! ■ H IQOQ PEET 



A. Scotland beds. B. Oceanic beds. C. Coral-rock. 



the structure of this slope, and we do not think that the thickness of 

 the rock which forms the line of cliffs anywhere exceeds 250 feet. 



This view is confirmed by the fact that between St. Joseph's 

 Church and Mount Dacres the base-line of the coral-rock falls from 

 about 800 feet to only 500 feet above the sea, for we believe that 

 this slope is an oblique intersection of the natural slope of the sur- 

 face against which the reefs were successively formed. 



The terraces which occur at a still lower level in the south-eastern 

 part of the island, and which now terminate in the escarpment 

 below St. Mark's Church, doubtless originally extended northwards 

 at least as far as the point where the Oceanic Series is faulted 

 against the Scotland beds. This former extension of the reefs is 

 indicated by several outlying patches of coral-rock not far from the 

 coast-line. 



One of these is an isolated limestone rock, about 70 feet high, 

 which overhangs the railway north-east of Codrington. Farther 

 north there is a patch of coral-rock covering about 20 acres, and 

 capping the hill through which the railway passes north-west of 

 Bath Station. Beyond this, however, we do not suppose there were 



