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 36 330 MIDDLE ALBIAN 129.0 186.0 NO AGE GIVEN NO AGE GIVEN 104 106 105 DSDP INITIAL REPORTS 36 330 APTIAN 224.0 233.5 NO AGE GIVEN NO AGE GIVEN 108 110 109 DSDP INITIAL REPORTS 36 330 NEOCOMIAN 271.5 281.0 NO AGE GIVEN NO AGE GIVEN 121 135 128 DSDP INITIAL REPORTS 36 330 KIMMERIDGIAN OXFORDIAN 300.0 352.0 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 138 149 143.5 DSDP INITIAL REPORTS 36 330 UPPER JURASSIC 352.0 556.5 NO AGE GIVEN NO AGE GIVEN 135 149 142 DSDP INITIAL REPORTS 36 330 PRECAMBRIAN 556.5 575.5 NO AGE GIVEN NO AGE GIVEN 192 193 192.5 DSDP INITIAL REPORTS