R e gional Geolog y 3 T he T ema ga mi A no mal y is situa ted be lo w r oc ks of the Hur on ian S up er g r o up a se dimen tar y ba sin tha t de po sited be tw ee n 245 to 22 bill ion y ea r s a go T he Hur on ian S ed iments r es t on A r c he an r oc ks tha t ar e li k el y an e xtens ion of t he 27 G a T ema gami g r ee ns ton e be lt to the ea st S itua ted to the w es t of the T ema ga mi A no mal y is the S ud bu r y ba sin a 185 G a suite of m afi c r oc ks r eco gniz ed as the r emn an t of an impac t cr a ter melt sh ee t T he so ur ce of the T ema ga mi A no mal y is li k el y an i ntr us ion bu t r ema ins un kn o wn T ema gami Anomal y O utline