360 PROF. SPENCER ON THE GEOLOGICAL AND [Aug. 1902, 
determined in Antigua. In my papers on these islands,’ I have 
collected evidence showing that the limestones belong to the 
Oligocene Period, or what was for- 
merly called Lower Miocene, and 
are equivalent to certain Oligocene 
Beds of the South-eastern States of 
America. 
Additional evidence of the age of 
Svvvvvvvy 
Ler } 
tioned by Prof. Gregory.2 Since 
Dunean’s studies of the Antiguan 
corals, the White Limestones in other 
islands have been frequently com- 
asses of the Oceanic 
4 = Bed of branching corals, with the upper layers 
equivalence on the American con- 
tinent, whether in the typical island 
or in Barbados they may be appro- 
priately called the Antigua Form- 
ation. 
NN NN SINS) NJ N/ NVR 
artly from the Scotland Series and partly from 
pebbles of the White Limestone and rolled m 
= Bed of massive corals, 5 to 8 feet. 
VII. Tue Raceen-Pornt SeRizs. 
After the deformation and eleva- 
tion of the Antigua or old White- 
Limestone Series, there was an 
extensive denudation of its surface. 
when eventually the land stood for 
a long time at a low elevation 
above the base-level of erosion, so. 
that the resulting outlines were 
broad undulating features. In 
places, this denudation left bare the 
underlying Oceanic Series. Upon the 
denuded surface of this formation a 
bed of mechanical lmestone was 
accumulated, which now rests in an 
horizontal position. Remains of 
this, having a thickness of 6 feet, 
may be seen lying in the hollows 
of the eroded surface of the up- 
turned beds of the older white 
limestones of Ragged Point, as 
shown in fig. I (p. 358). The 
material is a marl containing water- 
worn pebbles of the harder lime- 
stones. At other points, fragments of rolled Oceanic Clays were 
seen in this mechanical series. The only fossils observed were 
sands (derived p 
VEN 
Stratified 
comminuted limestone) with rounded 
Clay, 4 to 5 feet. 
ection about a mile north of Bath (Barbados). 
— Si 
Vie NAN ENE LSS 
—_— 
2 
Fiz, 2. 
vVvVvVVvV 
9 
vo 
laminated, 30 feet. 
1 = Underlying Oceanic Series, 
VVMVV VV wv 
21 ¢On Antigua, Guadeloupe, Anguilla, St. Martin, St. Christopher, etc.’ Quart. 
Journ. Geol. Soe. vol. lvii (1901) pp. 490-544. 
2 Tbid. vol. li (1895) p. 295. 
the Antiguan beds has been men- 
pared, in regard to age, with those of 
Antigua, and as we now know their 
