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 22 211 QUATERNARY 0.0 18.0 NO AGE GIVEN NO AGE GIVEN 0 1.8 0.9 DSDP INITIAL REPORTS 22 211 UPPER PLIOCENE 57.0 66.0 NO AGE GIVEN NO AGE GIVEN 1.8 3.4 2.6 DSDP INITIAL REPORTS 22 211 PLIOCENE 95.0 304.0 NO AGE GIVEN NO AGE GIVEN 1.8 5 3.4 DSDP INITIAL REPORTS 22 211 MAESTRICHTIAN CAMPANIAN 409.0 418.5 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 65 78 71.5 DSDP INITIAL REPORTS 22 211 CAMPANIAN 418.5 437.5 NO AGE GIVEN NO AGE GIVEN 70 78 74 DSDP INITIAL REPORTS