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 95 603 E LOWER MIOCENE 936.4 946.0 NO AGE GIVEN NO AGE GIVEN 16 22.5 19.25 INITIAL CORE DESCRIPTIONS 95 603 E LOWER BARREMIAN UPPER HAUTERIVIAN 1258.0 1289.7 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 118 123 120.5 INITIAL CORE DESCRIPTIONS