▁of ▁this ▁sort ▁has ▁been ▁proposed ▁to ▁have ▁s our ced ▁the ▁War re go ▁Vall es ▁in ▁the ▁Th aum asia ▁High lands . ▁It ▁has ▁also ▁been ▁proposed ▁in ▁the ▁southern ▁Cop r ates ▁R ise ▁and ▁in ▁a ▁r ift ▁in ▁the ▁south western ▁sector ▁of ▁the ▁plate au ▁proper . ▁ ▁See ▁also ▁List ▁of ▁pla ins ▁on ▁Mars ▁Ge ology ▁of ▁Mars ▁ ▁References ▁▁ ▁Category : Sur face ▁features ▁of ▁Mars <0x0A> </s> ▁In ▁sports ▁that ▁use ▁a ▁clock , ▁un tim ed ▁play ▁is ▁play ▁in ▁which ▁the ▁clock ▁does ▁not ▁tick . ▁In ▁some ▁cases , ▁un tim ed ▁play ▁can ▁occur ▁at ▁the ▁end ▁of ▁a ▁game ▁following ▁the ▁exp iration ▁of ▁the ▁clock , ▁and ▁may ▁even ▁be ▁when ▁a ▁score ▁occurs ▁that ▁dec ides ▁the ▁outcome ▁of ▁the ▁game . ▁ ▁Grid ir on ▁football ▁In ▁grid ir on ▁football , ▁un tim ed ▁play ▁occurs ▁in ▁the ▁following ▁situations : ▁ ▁Ext ra ▁points ▁following ▁touch down s ▁are ▁attempted ▁without ▁the ▁clock ▁tick ing ▁( except ▁in ▁ar ena ▁football , ▁which ▁uses ▁a ▁continu ously ▁running ▁clock ▁except ▁in ▁the ▁last ▁minute ▁of ▁a ▁half ) ▁ ▁If ▁the ▁clock ▁exp ires ▁while ▁a ▁play ▁is ▁in ▁progress , ▁the ▁play ▁continues ▁un tim ed ▁until ▁the ▁ball ▁is ▁dead ▁ ▁If , ▁at ▁the ▁end ▁of ▁a ▁quarter ▁or ▁a ▁half , ▁a ▁def ensive ▁f oul ▁occurs , ▁the ▁off ense ▁is ▁entitled ▁to ▁an ▁un tim