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 73 524 LOWER EOCENE 0.0 38.0 NO AGE GIVEN NO AGE GIVEN 49 53.5 51.25 DSDP INITIAL REPORTS 73 524 PALEOCENE 47.5 66.5 NO AGE GIVEN NO AGE GIVEN 53.5 65 59.25 DSDP INITIAL REPORTS 73 524 UPPER PALEOCENE 66.5 123.5 NO AGE GIVEN NO AGE GIVEN 53.5 60 56.75 DSDP INITIAL REPORTS 73 524 LOWER PALEOCENE 142.5 203.5 NO AGE GIVEN NO AGE GIVEN 60 65 62.5 DSDP INITIAL REPORTS 73 524 MAESTRICHTIAN 203.5 264.8 NO AGE GIVEN NO AGE GIVEN 65 70 67.5 DSDP INITIAL REPORTS 73 524 MAESTRICHTIAN UPPER TURONIAN 264.8 348.5 A LEGITIMATE AGE INVERSION NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 65 88 76.5 DSDP INITIAL REPORTS