geology of Saskatchewan
... that six prehistoric meteorite impacts have created large astroblemes affecting the geology of Saskatchewan?
... that six prehistoric <a class="mw-redirect" href="./List_of_impact_craters_in_Canada" id="mwGhg" rel="mw:WikiLink" title="List of impact craters in Canada">meteorite impacts</a> have created large <a class="mw-redirect" href="./Astrobleme" id="mwGhk" rel="mw:WikiLink" title="Astrobleme">astroblemes</a> affecting the <b id="mwGho"><a href="./Geology_of_Saskatchewan" id="mwGhs" rel="mw:WikiLink" title="Geology of Saskatchewan">geology of Saskatchewan</a></b>?