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
28	272		LOWER PLIOCENE		4.0	13.5		NO AGE GIVEN		NO AGE GIVEN	  3.4	    5	  4.2	DSDP INITIAL REPORTS
28	272		UPPER MIOCENE		13.5	32.5		NO AGE GIVEN		NO AGE GIVEN	    5	 10.5	 7.75	DSDP INITIAL REPORTS
28	272		UPPER MIOCENE	MIDDLE MIOCENE	32.5	137.0		NO AGE GIVEN	NO AGE GIVEN	NO AGE GIVEN	    5	   16	 10.5	DSDP INITIAL REPORTS
28	272		MIDDLE MIOCENE		137.0	203.5		NO AGE GIVEN		NO AGE GIVEN	 10.5	   16	13.25	DSDP INITIAL REPORTS
28	272		UPPER MIOCENE	MIDDLE MIOCENE	203.5	279.5	A LEGITIMATE AGE INVERSION	NO AGE GIVEN	NO AGE GIVEN	NO AGE GIVEN	    5	   16	 10.5	DSDP INITIAL REPORTS
28	272		MIDDLE MIOCENE		279.5	441.0		NO AGE GIVEN		NO AGE GIVEN	 10.5	   16	13.25	DSDP INITIAL REPORTS