Most recent activity are pyroclastic deposits dated at 3000 yr BP, so this is an active volcano.
(Most recent activity; are; pyroclastic deposits dated at 3000 yr BP) (pyroclastic deposits; dated; at 3000 yr BP) (this; is; an active volcano)
Most recent activity pyroclastic deposits this
are dated is
pyroclastic deposits dated at 3000 yr BP
at 3000 yr BP
an active volcano