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 17 164 LOWER MIOCENE 14.0 34.0 NO AGE GIVEN NO AGE GIVEN 16 22.5 19.25 DSDP INITIAL REPORTS 17 164 LOWER OLIGOCENE 34.0 43.0 NO AGE GIVEN NO AGE GIVEN 30 37.5 33.75 DSDP INITIAL REPORTS 17 164 MIDDLE EOCENE 43.0 61.0 NO AGE GIVEN NO AGE GIVEN 43 49 46 DSDP INITIAL REPORTS 17 164 LOWER EOCENE 61.0 70.0 NO AGE GIVEN NO AGE GIVEN 49 53.5 51.25 DSDP INITIAL REPORTS 17 164 CAMPANIAN 70.0 88.0 NO AGE GIVEN NO AGE GIVEN 70 78 74 DSDP INITIAL REPORTS 17 164 SANTONIAN CONIACIAN 98.0 164.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 78 86 82 DSDP INITIAL REPORTS 17 164 TURONIAN CENOMANIAN 164.0 192.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 86 100 93 DSDP INITIAL REPORTS 17 164 ALBIAN BARREMIAN 238.0 247.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 100 121 110.5 DSDP INITIAL REPORTS