leg site hole age mnemonic auxiliary age mnemonic top of section depth(m) bottom of section depth(m) special condition age auxiliary age averaged age age top of section(million years) age bottom of section(million years) average age(million years)t data source 65 485 A QUATERNARY 50.5 60.0 NO AGE GIVEN NO AGE GIVEN 0 1.8 0.9 DSDP INITIAL REPORTS 65 485 A UPPER QUATERNARY 60.0 79.0 NO AGE GIVEN NO AGE GIVEN 0 0.8 0.4 DSDP INITIAL REPORTS 65 485 A QUATERNARY LOWER QUATERNARY 79.0 322.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0 1.8 0.9 DSDP INITIAL REPORTS