The Great Barrier Reef


Uploaded by MIQUELENGLISH on 22.06.2011

Transcript:
The largest of Australia's natural wonders is the Great Barrier Reef.
It fringes fourteen hundred miles of the tropical Queensland coast.
It's a complex mosaic of three thousand individual reefs and many small islands,
all built of coral and sand.
Evolved over hundreds of thousands of years, it's one of Nature's most impressive creations.
The first astronauts to circle the Earth reported they could make out
the colour and shapes of the individual reefs and lagoons,
and the vivid blue of the deeper open water in-between.
Closer to the surface the separate coral formations become discernible.
Each one is a community of different kinds of coral
that between them create these intricate limestone structures.
This colony of brain coral is twenty feet in
diameter and perhaps two thousand years old,
just one component part of the largest living structure on our planet.