▁ ▁A ▁potential ▁link ▁has ▁been ▁proposed ▁between ▁such ▁sub - C amb rian ▁un con form ities ▁and ▁gla cial ▁er os ion ▁during ▁the ▁Ne opro ter oz o ic ▁Snow ball ▁Earth ▁gla ci ations . ▁ ▁See ▁also ▁ ▁Ge ology ▁of ▁the ▁Grand ▁C any on ▁area ▁( with ▁time ▁scale ) ▁ ▁List ▁of ▁or ogen ies ▁ ▁O ro gen y ▁( mount ain ▁building ) ▁ ▁References ▁ ▁External ▁links ▁ ▁H utton ' s ▁Un con form ity ▁ ▁An onymous ▁( 2 0 0 3 ) ▁Sic car ▁Point ▁Field ▁Ex c urs ion ▁Pre view . ▁School ▁of ▁Ge o S ci ences , ▁University ▁of ▁Edinburgh , ▁Edinburgh , ▁Scotland . ▁last ▁accessed ▁September ▁ 2 2 , ▁ 2 0 1 3 . ▁ ▁Moore , ▁R ▁( 2 0 0 9 ) ▁Sic car ▁Point . ▁Re ports ▁of ▁the ▁National ▁Center ▁for ▁Science ▁Education . ▁ 2 9 ( 1 ): 2 6 . ▁last ▁accessed ▁September ▁ 2 2 , ▁ 2 0 1 3 . ▁ ▁Row an , ▁C ▁( 2 0 1 1 ) ▁The ▁making ▁of ▁an ▁angular ▁un con form ity : ▁H utton ’ s ▁un con form ity ▁at ▁Sic car ▁Point . ▁High ly ▁Al lo ch th on ous . ▁last ▁accessed ▁September ▁ 2 2 , ▁ 2 0 1 3 . ▁▁ ▁Pow ell ' s ▁Un con form ity ▁ ▁Abb ott , ▁W ▁(