▁northern ▁Mexico , ▁north ▁of ▁Cas as ▁Grand es , ▁Ch ih u ah ua . ▁ ▁G ila ▁Black - on - red ▁Similar ▁in ▁dates , ▁designs ▁and ▁ge ographic ▁distribution ▁to ▁G ila ▁Pol ych rome ▁but ▁without ▁the ▁white ▁s lip ▁underlying ▁black ▁paint . ▁ ▁T onto ▁Pol ych rome ▁T onto ▁Pol ych rome ▁is ▁found ▁in ▁higher ▁frequencies ▁on ▁j ars . ▁The ▁black ▁on ▁white ▁designs ▁are ▁generally ▁nar ro wer ▁bands ▁than ▁on ▁G ila ▁j ars , ▁or ▁pan els ▁of ▁decor ation , ▁and ▁are ▁surrounded ▁by ▁red ▁s lip . ▁This ▁type ▁has ▁a ▁later ▁starting ▁date ▁than ▁G ila ▁Pol ych rome , ▁AD ▁ 1 3 4 0 ▁and ▁an ▁end ▁date ▁of ▁ 1 4 5 0 . ▁ ▁Cl iff ▁Pol ych rome ▁ ▁Cl iff ▁Pol ych rome ▁is ▁identified ▁by ▁sty list ic ▁and ▁morph ological ▁characteristics ▁that ▁distinguish ▁it ▁from ▁G ila ▁Pol ych rome . ▁ ▁D ates ▁given ▁for ▁this ▁type ▁range ▁from ▁AD ▁ 1 3 0 0 - 1 4 5 0 ▁( L y ons ▁ 2 0 0 4 ). ▁ ▁This ▁type ▁is ▁found ▁in ▁bow l ▁form ▁and ▁can ▁be ▁partially ▁identified ▁by ▁rec ur ved ▁and ▁semi - fl aring ▁r ims . ▁Ac company ing ▁the ▁shift ▁in ▁bow l ▁shape ▁is ▁a ▁drop ▁in ▁the ▁band ing ▁line , ▁creating ▁a ▁secondary ▁design ▁field ▁between ▁the ▁band ing ▁line ▁and ▁the ▁rim .