Schooler Creek Group
The Schooler Creek Group is a stratigraphic unit of Middle to Late Triassic ( Ladinian to Norian ) age in the Western Canadian Sedimentary Basin . 
<triplet> Middle <subj> Late Triassic <obj> followed by <triplet> Ladinian <subj> Late Triassic <obj> followed by <triplet> Norian <subj> Late Triassic <obj> part of