https://www.vice.com/en_us/article/8xwg95/this-giant-raft-of-volcanic-rock-could-help-heal-the-great-barrier-reef

An enormous raft of volcanic powder is floating across the South Pacific Ocean, and may eventually end up enriching the Great Barrier Reef with nutrients and new lifeforms.

This expanse of pumice—a type of glass-rich volcanic debris—was belched up a few weeks ago by an undersea volcano located about 30 miles northwest of the Tongan island of Vava’u. It currently stretches for 58 square miles, an area the size of Staten Island.