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 32 310 A MAESTRICHTIAN LOWER CAMPANIAN 95.0 104.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 65 78 71.5 DSDP INITIAL REPORTS 32 310 A LOWER MAESTRICHTIAN LOWER CAMPANIAN 104.5 193.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 67.5 78 72.75 DSDP INITIAL REPORTS 32 310 A LOWER CAMPANIAN UPPER TURONIAN 193.5 212.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 74 88 81 DSDP INITIAL REPORTS 32 310 A SANTONIAN UPPER TURONIAN 212.5 231.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 78 88 83 DSDP INITIAL REPORTS 32 310 A CAMPANIAN UPPER TURONIAN 231.5 241.0 A LEGITIMATE AGE INVERSION NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 70 88 79 DSDP INITIAL REPORTS 32 310 A SANTONIAN UPPER TURONIAN 241.0 269.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 78 88 83 DSDP INITIAL REPORTS 32 310 A CONIACIAN 269.0 278.0 A LEGITIMATE AGE INVERSION NO AGE GIVEN NO AGE GIVEN 82 86 84 DSDP INITIAL REPORTS 32 310 A CONIACIAN LOWER CENOMANIAN 287.5 292.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 82 100 91 DSDP INITIAL REPORTS 32 310 A LOWER TURONIAN CENOMANIAN 297.0 315.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 90 100 95 DSDP INITIAL REPORTS 32 310 A LOWER CENOMANIAN UPPER ALBIAN 325.0 352.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 97.5 104 100.8 DSDP INITIAL REPORTS