Sierra Madera crater
Apollo 17's Gene Cernan and Jack Schmitt did some of their geologic training here . 
<triplet> Apollo 17 <subj> Gene Cernan <obj> crew member <subj> Jack Schmitt <obj> crew member <triplet> Gene Cernan <subj> Apollo 17 <obj> astronaut mission <triplet> Jack Schmitt <subj> Apollo 17 <obj> astronaut mission