7. Recent Investigations on the 

 Stratigraphy of Deep-Sea 

 Sediments 



k^ince April, 1952, when the Silliman Lectures which 

 compose this book were delivered, a highly important 

 contribution to our knowledge of deep-sea sediments 

 and their stratigraphy has been made by Gustaf Ar- 

 rhenius, geologist of the Swedish Deep-Sea Expedition, 

 in his doctoral thesis, Sediment Cores from the East 

 Pacific, published as one of the reports of the Expedi- 

 tion. ^ It was submitted for official discussion at Stock- 

 holm's Hogskola on November 15, 1953. 



The very comprehensive analytical work on which 

 this thesis was based was carried out at Kagghamra, 

 Sweden, by Arrhenius and a staff of collaborators, in- 

 cluding two specialists on microfossils, F. Brotzen and 

 R. Kolbe of Stockholm. Generous grants-in-aid for the 

 work were given by the Swedish Research Council, the 

 Lars Hierta Memorial Foundation, and the Wallenberg 

 Foundation, all of Stockholm. 



Part 1 of the volume contains the report on the 



101 



