▁Valley ▁near ▁San ▁Diego ▁Stadium . ▁ ▁Ge ology ▁ ▁The ▁formation ▁consists ▁of ▁a ▁massive ▁c ob ble ▁con gl omer ate ▁with ▁a ▁dark ▁yellow ish - b rown ▁co arse - gra ined ▁sand stone ▁matrix . ▁The ▁con gl omer ate ▁has ▁dispers ed ▁l enses ▁of ▁foss il ifer ous ▁cross bed ded ▁sand stone . ▁ ▁It ▁over lies ▁the ▁Fri ars ▁Form ation , ▁and ▁under lies ▁the ▁sand stone ▁Mission ▁Valley ▁Form ation . ▁ ▁F oss il ▁content ▁ ▁It ▁pres erves ▁foss ils ▁d ating ▁back ▁to ▁the ▁E oc ene ▁epo ch ▁of ▁the ▁Pale ogene ▁period , ▁during ▁the ▁C en oz o ic ▁Era . ▁ ▁The ▁foss ils ▁include ▁cal care ous ▁nan op l ank ton . ▁ ▁See ▁also ▁▁▁▁▁▁▁ ▁List ▁of ▁foss il ifer ous ▁strat ig raph ic ▁units ▁in ▁California ▁ ▁Pale ont ology ▁in ▁California ▁ ▁References ▁ ▁Further ▁reading ▁▁▁▁ ▁Category : Ge olog ic ▁form ations ▁of ▁California ▁Category : P ale ogene ▁strat ig raph ic ▁units ▁of ▁North ▁America ▁Category : P ale ogene ▁California ▁Category : E oc ene ▁Series ▁of ▁North ▁America ▁Category : C ong l omer ate ▁form ations ▁Category : Ge ology ▁of ▁San ▁Diego ▁County , ▁California ▁Category : Ge ography ▁of ▁San ▁Diego ▁Category : M ission ▁Valley , ▁San ▁Diego ▁Category : P ale ont ology ▁in ▁California <0x0A> </s> ▁This ▁is ▁a ▁list ▁of ▁c athed r als ▁in ▁France