Dictionary entry overview: What does accretion mean? â¢ ACCRETION (noun) The noun ACCRETION has 6 senses: 1. an increase by natural growth or addition 2. something contributing to growth or increase 3. (astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases 4.
Great Barrier Reef. The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres (1,400 mi) over an area of approximately 344,400 square kilometres (133,000 sq mi). The reef is located in the Coral Sea, off the coast of Queensland, Australia.
Aerial views of The Great Barrier Reef are seen from above on August 7, 2009 in Cairns, Australia. GREAT BARRIER REEF, Australia A writer has declared the Great Barrier Reef in Australia officially dead after a story in September said that the bleaching of the reef's coral this year has caused it to decline. ABC News in Australia reported last month that bleaching had killed 35 percent of coral in the central and northern parts of the reef.