“…A more recently recognized caldera complex, the Crater Flat caldera (Carr, 1982) is hypothesized to be west of Yucca Mountain in the Crater Flat area ( fig. 4), and could extend east to include part The caldera complexes occur along the Walker Lane zone (Gianella and Callaghan, 1934;Carr, 1976) and in a zone characterized by the presence of northeasttrending left-lateral faults. The area is also of the Yucca Mountain area.…”