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 20 196 QUATERNARY 38.7 39.1 NO AGE GIVEN NO AGE GIVEN 0 1.8 0.9 DSDP INITIAL REPORTS 20 196 CAMPANIAN 104.0 110.0 NO AGE GIVEN NO AGE GIVEN 70 78 74 DSDP INITIAL REPORTS 20 196 HAUTERIVIAN VALANGINIAN 197.0 310.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 121 131 126 DSDP INITIAL REPORTS 20 196 LOWER CRETACEOUS UPPER JURASSIC 360.5 360.9 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 100 149 124.5 DSDP INITIAL REPORTS