ACKNOWLEDGMENTS 
The writer thanks Dr. Maurice Ewing, Director of Lamont Geo- 
logical Observatory, for the opportunity to work on the unique collection 
of bottom samples which is the subject of this report, 
He is grateful to Dr, Walter Bucher, Department of Geology, 
Columbia University for valuable advice and encouragement, He is in 
debt to Bruce C. Heezen, who by combining knowledge of ocean bottom 
topography with theories of sedimentation, has taken many particularly 
important cores and dredge samples, 
Without the loyal help of my assistants GUsta and Janet Wollin 
this research could not have gone on, They have taken part in all aspects 
of the work from the construction of core racks to detailed analyses of 
foraminiferal assemblages and have supplied a multitude of invaluable 
ideas together with the energy and ingenuity to put them into effect. 
To others associated with the Lamont Geological Observatory 
who have aided directly or indirectly in this study the writer gives his 
thanks, 
