A cloud of burning hot gas that travels quickly down the
side of a volcano during an eruption; a
type of pyroclastic flow. Small
particles of dust and ash may be carried in the cloud, which kills anyone
and anything it passes over. In 1902 a nuee ardente accompanying the eruption
of Mount Pelee accounted for the deaths of all but one of the inhabitants
of St Pierre, on the island of Martinique.
AND PLANETARY SCIENCE