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 26 256 QUATERNARY 0.0 9.5 NO AGE GIVEN NO AGE GIVEN 0 1.8 0.9 DSDP INITIAL REPORTS 26 256 QUATERNARY PLIOCENE 9.5 57.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 0 5 2.5 DSDP INITIAL REPORTS 26 256 PLIOCENE 123.5 128.8 NO AGE GIVEN NO AGE GIVEN 1.8 5 3.4 DSDP INITIAL REPORTS 26 256 UPPER CRETACEOUS 180.5 218.5 NO AGE GIVEN NO AGE GIVEN 65 100 82.5 DSDP INITIAL REPORTS 26 256 ALBIAN 237.5 256.5 NO AGE GIVEN NO AGE GIVEN 100 108 104 DSDP INITIAL REPORTS