UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Da(a Entered) 



this time may have formed the Eauripik Rise through blockage of westward axial 

 mantle flow at a transform dam. Non-uniform cessation of spreading began in 

 Upper Oligocene, together with the obduction of the southern portion of the 

 ancestral ridge onto New Guinea, with concurrent northward subduction of 

 basin crust at the southern base of the remnant northern ancestral ridge. An 

 extensional trough opened in the northern ridge and expanded until collision 

 with the eastward advancing Yap-Palau arc in Upper Miocene. 



S/N 0102- LF-0I4-6601 



SECURITY CLASSIFICATION OF THIS PAGEfWhen Data Entared) 



