Table 2. Age assignments for Calvert teeth. Picture File # of Teeth Zone Age Range L.R. Age Calvert01.tif 1 19 12.0 – 12.7 Ma 12.35 Ma Calvert02.tif 3 14 14.0 – 14.5 Ma 14.25 Ma Calvert03.tif 6 14 14.0 – 14.5 Ma 14.25 Ma Calvert04.tif 4 13 14.5 – 14.9 Ma 14.70 Ma Calvert05.tif 4 12 14.9 – 15.2 Ma 15.05 Ma Calvert06.tif 6 11 15.2 – 15.8 Ma 15.50 Ma Calvert07.tif 5 10 15.8 – 16.5 Ma 16.15 Ma Calvert08.tif 2 8 16.7 – 16.9 Ma 16.80 Ma Calvert09.tif 1 3 17.5 – 18.4 Ma 17.95 Ma