The Quarterly journal of the Geological Society of London . inst its foot, and accordingly we find narrowand 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. JohnsChurch at a level of about 700 feet, and that all the coral-rockplateaux to the southward run in below the line of cliffs from the700-feet terrace down to that which passes above Sealy Hall atabout 300 feet. Below Hacklestons Cliffs, which rise to 1000 feet above the sea,the slope is covered wit
The Quarterly journal of the Geological Society of London . inst its foot, and accordingly we find narrowand 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. JohnsChurch at a level of about 700 feet, and that all the coral-rockplateaux to the southward run in below the line of cliffs from the700-feet terrace down to that which passes above Sealy Hall atabout 300 feet. Below Hacklestons Cliffs, which rise to 1000 feet above the sea,the slope is covered with coral-rock down to a level of 500 feet nearMount Dacres, according to levels which have been kindly commu-nicated by Mr. E. Easton, , This slope is broken and un-even, owing to the frequent landslips which have occurred by theslipping of the lower reefs over the surface of the Scotland 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. HORJZ ,SCI\LEV^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 ofthe rock which forms the line of cliffs anywhere exceeds 250 feet. This view is confirmed by the fact that between St. JosephsChurch and Mount Dacres the base-line of the coral-rock falls fromabout 800 feet to only 500 feet above the sea, for we believe thatthis 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-easternpart of the island, and which now terminate in the escarpmentbelow St. Marks Church, doubtless originally extended northwardsat least as far as the point where the Oceanic Series is faultedagainst the Scotland beds. This former extension of the reefs isindicated by several outlying patches of coral-rock not far from thecoas
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