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 14 137 TERTIARY 52.0 61.0 NO AGE GIVEN NO AGE GIVEN 1.8 65 33.4 DSDP INITIAL REPORTS 14 137 MAESTRICHTIAN 165.0 173.0 NO AGE GIVEN NO AGE GIVEN 65 70 67.5 DSDP INITIAL REPORTS 14 137 CAMPANIAN 209.0 218.0 NO AGE GIVEN NO AGE GIVEN 70 78 74 DSDP INITIAL REPORTS 14 137 CAMPANIAN TURONIAN 218.0 225.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 70 92 81 DSDP INITIAL REPORTS 14 137 TURONIAN CENOMANIAN 256.0 265.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 86 100 93 DSDP INITIAL REPORTS 14 137 CENOMANIAN 265.0 357.0 NO AGE GIVEN NO AGE GIVEN 92 100 96 DSDP INITIAL REPORTS 14 137 ALBIAN 375.0 394.0 NO AGE GIVEN NO AGE GIVEN 100 108 104 DSDP INITIAL REPORTS