The Quarterly journal of the Geological Society of London . ,the beds slope at 20° to the east-south-east. On the eastern sideof the gully are beds dipping at 18° eastward, succeeded byothers inclined at 27° south-eastward. A little east of the gullythe dip in these diminishes to 5° in the same direction, whilefarther east the strata are horizontal. (See fig. 12, p. 330). The thickness of coral-rock is shown in the wells near Dukes to beabout 170 feet; in the well at Haynesfield, sunk from a somewhatlower level than the bottom of the quarry, there are 140 feet ofcoral-rock; while the wells nea
The Quarterly journal of the Geological Society of London . ,the beds slope at 20° to the east-south-east. On the eastern sideof the gully are beds dipping at 18° eastward, succeeded byothers inclined at 27° south-eastward. A little east of the gullythe dip in these diminishes to 5° in the same direction, whilefarther east the strata are horizontal. (See fig. 12, p. 330). The thickness of coral-rock is shown in the wells near Dukes to beabout 170 feet; in the well at Haynesfield, sunk from a somewhatlower level than the bottom of the quarry, there are 140 feet ofcoral-rock; while the wells near Blackmans, at a somewhat lowerelevation than the floor of the upper part of the gully, are about180 feet deep. Hence these inclined beds, which might be held asbeing somewhat in conformity with Prof. Spencers theory, inplace of occurring (as that theory requires) near the base of thelimestone-succession, are relatively high in it. At Mount-Wilton Hill, at an elevation of about 1000 feet Pig. 13.—Section at Mount-Wilton Bill (altitude = 1000 feet).. [Horizontal and vertical scales : 1 inch = 8 feet.] in a road-cutting, beds about 4 feet thick are exposed, dipping at6° or 8° south-south-eastward and lying upon others inclined at2° to the south. It is clearly evident that the beds showing considerable angles of 332 PROF. J. B. HARRISON ON [Aug. I907,. dip in the 800- to 1100-foot plateau-district are current- or false-bedded, and are such as would naturally occur at places on, or nearto, the escarpments of a rising coral-island. A long series of exposures was followed from Castle Grant in anorth-westerly direction to the north-west of Mount Misery, adistance, as the crow flies, of about 3 miles. From Little Island and Castle Grant to Niccolls the limestone-beds are practically horizontal. The limestone of the long lowcliff, which extends in a north-westerly direction from Niccolls toChimborazo, a distance of about three-quarters of a mile, dips atabout 3° eastward near
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