A pumice raft is a floating raft of pumice occasionally created by ocean-based volcanic activity. Pumice is a textural term for a volcanic rock that is a solidified frothy lava composed of highly microvesicular glass Pyroclastic with very thin translucent Plate tectonics and hotspots Divergent plate boundaries At the
Recent volcanic activity in the South Pacific near Tonga on August 12, 2006 revealed the emergence of a new island. The Kingdom of Tonga is an Archipelago in the south Pacific Ocean comprising 169 islands 36 of them inhabited stretching over a distance of about 800 kilometres (500 miles Events 1099 - First Crusade: Battle of Ascalon - Crusaders under the command of Godfrey of Bouillon defeat Fatimid Year 2006 ( MMVI) was a Common year starting on Sunday of the Gregorian calendar. The crew of the Maiken, a yacht that left the northern Tongan islands group of Vava'u in August, reported on their Web log  that they saw streaks of light, porous pumice stone floating in the water -- then "sailed into a vast, many-miles-wide belt of densely packed pumice. Pumice is a textural term for a volcanic rock that is a solidified frothy lava composed of highly microvesicular glass Pyroclastic with very thin translucent "
Pumice rafts drifted to Fiji in 1979 and 1984 from eruptions around Tonga, and some were reportedly 30 kilometers (19 miles) wide. Fiji (Matanitu ko Viti फ़िजी officially the Republic of the Fiji Islands (Matanitu Tu-Vaka-i-koya ko Viti फ़िजी द्वीप समूह गणराज्य