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 94 610 E LOWER PLIOCENE 260.0 269.6 NO AGE GIVEN NO AGE GIVEN 3.4 5 4.2 INITIAL CORE DESCRIPTIONS 94 610 E UPPER MIOCENE MIDDLE MIOCENE 269.6 327.2 NO AGE GIVEN NO AGE GIVEN NO AGE GIVEN 5 16 10.5 INITIAL CORE DESCRIPTIONS