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 66 493 UPPER QUATERNARY 0.0 6.0 NO AGE GIVEN NO AGE GIVEN 0 0.8 0.4 DSDP INITIAL REPORTS 66 493 PLIOCENE 120.0 148.5 NO AGE GIVEN NO AGE GIVEN 1.8 5 3.4 DSDP INITIAL REPORTS 66 493 LOWER PLIOCENE 148.5 196.0 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 DSDP INITIAL REPORTS 66 493 LOWER PLIOCENE UPPER MIOCENE 196.0 205.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 3.4 10.5 6.95 DSDP INITIAL REPORTS 66 493 UPPER MIOCENE 205.5 362.6 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 66 493 LOWER MIOCENE 362.6 367.0 NO AGE GIVEN NO AGE GIVEN 16 22.5 19.25 DSDP INITIAL REPORTS 66 493 MIDDLE MIOCENE LOWER MIOCENE 367.0 386.0 A LEGITIMATE AGE INVERSION NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 10.5 22.5 16.5 DSDP INITIAL REPORTS 66 493 LOWER MIOCENE 386.0 652.2 NO AGE GIVEN NO AGE GIVEN 16 22.5 19.25 DSDP INITIAL REPORTS 66 493 NEOGENE 661.5 662.1 A LEGITIMATE AGE INVERSION NO AGE GIVEN NO AGE GIVEN 1.8 22.5 12.15 DSDP INITIAL REPORTS