308 
PROF. SPENCER ON THE GEOLOGICAL AND 
fy 
| Aug. 1902, 
he found an admixture of species belonging to different horizons. 
The mollusca were from low levels, mostly lower than Ceres (70 
feet), and were in a better state of preservation than those of higher 
levels, such as at 150 feet above the sea. The low-level shells may 
syed Point (Barbados). 
AG 
? 
UC 
Fig. 1.—Section near L 
These show 
the altitude 
A bed 
Hard, massive, semicrystalline limestone, 40 feet. 2 
9 
vw 
Soft marly limestone, 20 feet exposed. 
dlc 
[All of these 
The strike of these beds continues to Three Houses, 2 miles inland. | 
A hard massive bed with eroded surface, 40 feet. 
containing masses of corals, 10 feet. 
1 
beds dip 15° to 26° south-eastward. 
s from | to 4 inches long, resting unconformably upon the lower 
A is a mechanical limestone, containing pebble 
‘emaining thickness reaches to 6 feet. 
the position of this bed is horizontal, and its 1 
beds : 
represent the fauna belonging to almost 
modern days, and even much later than 
the remains of recent species found at 
higher altitudes. It is a question of 
different horizons in apparently the same 
kind of rocks which needs consideration. 
The limestones are essentially white, 
with a texture sometimes soft and marly, 
while other layers are more compact. 
Generally the beds are devoid of organic 
remains, though in places casts of shells 
and corals are found; especially are the 
fragments of coral notable. But an 
overlying formation of the same mate- 
rials at lower levels is rich in corals. 
The older limestones cover the higher 
parts of the island, and may be seen 
to dip at from 12° to 20° south-eastward, 
as at the estates of Chimborazo, Cane- 
field, Mount Misery, etc., above 1000 feet 
in altitude; and from there at various 
points down to less than 100 feet above 
sea-level, near Ragged Point and Three 
Houses. At the higher points named, 
the limestones are only about 25 feet 
thick, resting unconformably upon the 
older eroded surfaces of the Oceanic 
Series. Near Ragged Point, Three 
Houses, and Bath, the inclined strata 
of this formation may be seen dipping 
and passing under other beds which rest 
unconformably on them in horizontal 
positions. Thus we find the accompany - 
ing section (fig. 1) in the reilway-cutting 
and bluffs near Ragged Point. On the 
southern and western side of the island, 
one cannot be certain of distinguishing 
the older beds from the newer, unless 
the dip, unconformity, or fossils identify 
them. Near the Cathedral at Bridge- 
town | found Stylophora sp. and Astro- 
coenia sp.(the same corals as the Oligocene 
species of Antigua), which were kindly 
determined for me by Dr. T. W. Vaughan. 
that the old White Limestone passes much below 
of the horizontal ‘raised coral-reefs,’ and that the 
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