The reef sits on top of thousands of years of compacted coral skeletons that have compressed and fused to form limestone rocks. So yes, there are rocks in the reef as it is principally composed of rock.

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the Great Barrier Reef is approximately 500,000 years old. However The structure of the current reef is much younger. It is less than around 8,000 years old. So it is hard to put your finger on the exact age of the Great barrier reef.

This is NOT the answer to the question...It is merely speculation.

In and around the Great Barrier Reef can be found:

* 1625 species of fish, including 1400 coral reef species

* More than 3000 species of molluscs (shells)

* 630 species of echinoderm (starfish, sea urchins)

* 14 species of sea snakes

* 215 species of birds including 22 species of seabirds and 32 species of shorebirds

* Six species of marine turtle (there are only 7 species in the world)

* 30 species of whales and dolphins

* one of the largest populations of dugong

* 133 species of sharks and rays

As well, there are an estimated 400 species of hard and soft corals, and at least 2195 known plant species.

Our world, Our future, Our reef

Because the Great Barrier Reef extends for 2000 km up the Queensland coast, there are several cities close to the reef. A large city which is closest to where the reef comes in nearest the coast is Cairns. Townsville is a large city along the coast, but the reef is not as accessible and close to shore from there. The southern end of the Great Barrier Reef is around 75km northwest of the port city of Gladstone. Brisbane is the nearest capital city to the Reef, but it is about 530km from the southern end. Contrary to popular overseas opinion, Sydney is nowhere near the Great Barrier Reef, as it is 930 kilometres south of Brisbane.

The environment affects the people in Paris, France in much of the same ways it does everywhere else. There are various forms of pollution that need to be handled, as well as wastes to be disposed of.

Australia's Great Barrier Reef could lose 95 percent of its living coral by 2050 should ocean temperatures increase by the 1.5 degrees Celsius projected by climate scientists.

While the Great Barrier Reef is one of the world's healthiest reefs, coral reefs are particularly fragile ecosystems, partly due to their sensitivity to water temperature. When corals are physiologically stressed -- as is the case when water temperatures are elevated -- they may lose much of the their symbiotic algae, an event known as "bleaching." Corals can recover from short-term bleaching, but prolonged bleaching can cause irreversible damage and subsequent death.

The vast majority of the Great Barrier Reef is in Australian waters, so it is managed by the Great Barrier Reef Marine Park Authority. A Zoning Plan covers the whole Great Barrier Reef Marine Park, and this plan determines where particular activities are permitted or not permitted. The plan also allows for certain areas of protection, while Plans of Management cover the more popular, high-use areas.

More detailed information can be found at the related link below.

The great barrier reef is a natural site, as humans did not influence the creation of it, but early Aborigional people and Torres Strait islanders had cultural connections with it.

There are some aborigines that inhabit the islands but generally the Great Barrier Reef is off-shore and a wildlife sanctuary. The total population living in the watershed on the Queensland cast is less than two million.

http://www.environment.gov.au/soe/2001/publications/theme-reports/biodiversity/biodiversity04-1f.html

The population of fish, sharks and other creatures is unknown. There are 125 species of shark that populate the Great Barrier Reef.

Lettuce Coral, brain coral, elkhorn coral, staghorn coral, star coral, fire coral, sea pen, scroll coral, golfball coral, mustard hill coral, rose coral, sea whips, maze coral, rigid cactus coral, orange cup coral.... and many more.

There are several things that can harm corals. Most of these are human activities like overfishing and any form of contact with the corals will damage them.

A fringing reef forms a continuous underwater "wall" for some distance, where as a "barrier Reef" are shorter in distances, and have large gaps in them....and will be between shore and the Barrier Reef..............
Sea Rambo

Figures vary, but according to the Australian Institute of Marine Science, the Great Barrier Reef is approximately 2,300km long. It is located in the Coral Sea and lies parallel to the coast of Queensland. It is actually a series of reefs and atolls, with its northern end just south of Papua New Guinea, and its southern end near Lady Elliott Island, northeast of the city of Bundaberg. This is the equivalent of about 1,430 miles.

One of the most biodiverse places in the world.