Chilcotin Plateau
Included within the definition of the Chilcotin Plateau are the Rainbow Range , near Bella Coola and the similarly volcanic Ilgachuz Range and Itcha Range both of which are major shield volcanoes . 
<triplet> Rainbow Range <subj> Chilcotin Plateau <obj> part of <triplet> Ilgachuz Range <subj> Chilcotin Plateau <obj> part of <subj> Rainbow Range <obj> has boundary <subj> Itcha Range <obj> has boundary <triplet> Itcha Range <subj> Chilcotin Plateau <obj> part of