18, 
locations are in order of the cores; 00°35'N, 21°47'W; 00°10'N, 23°00'w; 
00°03'S, 24°10'W; 00°46's, 26°02'W. 
A180-72 is 4,72 m, long and is raised from a depth of 3840 m, 
(2100 fms, ); Al80-73 is 4,90 m, long, depth 3750 m, (2050 fms, ); 
A180-74 is 4,80 m, long, depth 3330 m, (1820 fms, ); A180-76 is 4, 25 
long, depth 3515 m, (1920 fms, ). 
All four cores are composed of uniform foraminiferal lutite, 
The deposition seems to have been continuous and normal, In none of 
the cores is there any obvious evidence of turbidity currents, erosion, 
slumping, or re-worked older sediments, 
The study of several hundred cores has shown that well-defined 
faunal zones occur in the Pleistocene section deposited along the path 
of the present clockwise current system of the North Atlantic, 
Throughout the area of Gulf Stream circulation the cores, if 
sufficiently long, pass through a cold water zone in which Globorotalia 
menardii menardii is rare or abeent, and then through a warm water 
layer containing G. menardii flexuosa in abundance and into a lower zone 
containing a meager assemblage of cold water species. Correlation from 
core to core is confirmed by the remains of other organisms and by 
changes in the coiling direction of Globorotalia truncatulinoides, There 
is good evidence that the layers with few or no Globorotalia menardii 
were deposited during times of Pleistocene glaciation, It is noteworthy 
that these layers are well defined in cores from the Caribbean and easy 
to correlate with cores from the equatorial Atlantic some 6000 kilometers 
(3800 miles) away as well as with cores from the northern Atlantic, 
