▁d ating ▁back ▁to ▁the ▁Early ▁Mi oc ene ▁period . ▁ ▁See ▁also ▁▁ ▁List ▁of ▁foss il ifer ous ▁strat ig raph ic ▁units ▁in ▁Mexico ▁ ▁Mexican ▁am ber ▁ ▁References ▁ ▁Further ▁reading ▁▁ ▁M . ▁d . ▁C . ▁Per r ill iat , ▁F . ▁J . ▁V ega , ▁and ▁M . ▁A . ▁C out i ño . ▁ 2 0 1 0 . ▁Mi oc ene ▁m oll us ks ▁from ▁the ▁Sim oj ov el ▁area ▁in ▁Ch ia pas , ▁south western ▁Mexico . ▁Journal ▁of ▁South ▁American ▁Earth ▁Sciences ▁ 3 0 : 1 1 1 - 1 1 9 ▁ ▁S . ▁D . ▁Web b , ▁B . ▁L . ▁Beat ty , ▁and ▁G . ▁Po inar , ▁Jr . ▁ 2 0 0 3 . ▁New ▁evidence ▁of ▁Mi oc ene ▁Pro to cer at idae ▁including ▁a ▁new ▁species ▁from ▁Ch ia pas , ▁Mexico . ▁Bul letin ▁of ▁the ▁American ▁Museum ▁of ▁Natural ▁History ▁ 2 7 9 : 3 4 8 - 3 6 7 ▁ ▁Category : Ge olog ic ▁form ations ▁of ▁Mexico ▁Category : Ne ogene ▁Mexico ▁Category : A qu itan ian ▁Category : S and stone ▁form ations ▁Category : C ong l omer ate ▁form ations ▁Category : L ager st ätten <0x0A> </s> ▁Ran cho ▁Del ▁Mar ▁High ▁School ▁is ▁one ▁of ▁three ▁public ▁high ▁schools ▁on ▁the ▁Pal os ▁Ver des ▁Pen ins ula ▁( the