2 0 0 1 ) ▁Re vis iting ▁the ▁Grand ▁C any on ▁– ▁Through ▁the ▁E yes ▁of ▁Se ism ic ▁Se quence ▁Str at ig raph y . ▁A AP G ▁Dat ap ages ▁/ ▁Search ▁and ▁Disc overy , ▁American ▁Association ▁of ▁Pet role um ▁Ge ologist , ▁Tul sa , ▁Oklahoma . ▁last ▁accessed ▁September ▁ 2 2 , ▁ 2 0 1 3 . ▁ ▁Brand r iss , ▁M . ▁( 2 0 0 4 ) ▁Angular ▁un con form ity ▁between ▁Pro ter oz o ic ▁and ▁Camb rian ▁rocks , ▁Grand ▁C any on , ▁Arizona . ▁Ge o DI L , ▁A ▁Ge os cience ▁Digital ▁Image ▁Library , ▁University ▁of ▁North ▁Dak ota , ▁Grand ▁F ork s , ▁North ▁Dak ota . ▁last ▁accessed ▁September ▁ 2 2 , ▁ 2 0 1 3 . ▁ ▁Share , ▁J . ▁ ▁( 2 1 0 2 a ) ▁The ▁Great ▁Un con form ity ▁of ▁the ▁Grand ▁C any on ▁and ▁the ▁Late ▁Pro ter oz o ic - C amb rian ▁Time ▁Inter val : ▁Part ▁I ▁– ▁Def ining ▁It . ▁last ▁accessed ▁September ▁ 2 2 , ▁ 2 0 1 3 . ▁ ▁Share , ▁J . ▁ ▁( 2 1 0 2 a ) ▁The ▁Great ▁Un con form ity ▁and ▁the ▁Late ▁Pro ter oz o ic - C amb rian ▁Time ▁Inter val : ▁Part ▁II ▁– ▁The ▁R ifting ▁of ▁Rod in ia ▁and