During volcanic eruption deposition of lava in anticlines and synclines of folded mountains accounts...........

Explanation:

During volcanic eruption deposition of lava in  anticlines  and  synclines  of  folded mountains accounts for formation of phacolith. A phacolith is a pluton parallel to the bedding plane or foliation of folded country rock. More specifically, it is a typically lens-shaped pluton that occupies either the crest of an anticline or the trough of a syncline.