▁ter rane ▁ph yll ite , ▁quart z ite , ▁mar ble , ▁lim estone , ▁and ▁T ert i ary ▁vol can ic ▁rocks . ▁ ▁Many ▁trib ut aries ▁of ▁Po orm an ▁Creek ▁host ▁prospect s ▁or ▁mines . ▁ ▁See ▁also ▁Gold ▁min ing ▁in ▁Al aska ▁Pla cer ▁min ing ▁ ▁References ▁ ▁Category : G old ▁min ing ▁in ▁Al aska ▁Category : Ge ography ▁of ▁Y uk on – K oy u ku k ▁Census ▁Area , ▁Al aska ▁Category : Al ask an ▁gold ▁r ush es <0x0A> </s> ▁Cas to ▁may ▁refer ▁to : ▁ ▁People ▁ ▁Given ▁name ▁▁ ▁Cas to ▁( football er ) ▁( born ▁ 1 9 8 2 ), ▁Spanish ▁footballer ▁ ▁Cas to ▁In noc enz io ▁Ans ald i ▁( 1 7 1 0 – 1 7 8 0 ), ▁Italian ▁professor , ▁the olog ian ▁and ▁arch ae ologist ▁ ▁Cas to ▁Mé nd ez ▁N ú ñ ez ▁( 1 8 2 4 – 1 8 6 9 ), ▁Spanish ▁naval ▁officer ▁ ▁Cas to ▁N opo , ▁Equ at og u ine an ▁football ▁manager ▁ ▁Cas to ▁Pl as encia ▁( 1 8 4 6 – 1 8 9 0 ), ▁Spanish ▁painter ▁ ▁S urname ▁▁ ▁Frank ▁M . ▁Cas to ▁( 1 8 7 5 – 1 9 6 5 ), ▁American ▁orth od ont ist ▁ ▁Im manuel ▁Cas to ▁( born ▁ 1 9 8 3 ), ▁Italian ▁song