Pumice Stone
Island
Formed
 
Screen 1 of 2
 
An
underwater
volcano
is
 
the
source
 
of a pumice stone
island,
which has
formed
in the Pacific.
 
The
huge
mass
 
of
stone,
near to
Tonga,
 
has been
floating
through
 
the
Pacific
 
for
two weeks.