|Most of the fossil coral reefs lie in shallow pools on the sand flats - click to enlarge|
|The irregular raised patches are fossil coral colonies|
|A micro-atoll has a dead centre and a ring of living coral around the edge.|
|Barnacle covered cave wall near Port Douglas|
The following photos show some of the ancient coral colonies. Erosion of the ancient coral surface is evident in most places and much of the original surface features have been replaced with textures created by erosion.
|Rings show that this was a micro-atoll|
|This coral colony at nearby Little Reef Beach might be the same species.|
|Remains of a rosette coral|
|A living colony off the beach at Little Reef Beach|
|One of the massive coral colonies even had the remains of two burrowing clams in it |
(centre of photo)
|The round objects are the ends of stag horn coral and very hard and totally immobile|
Sea levels of the Great Barrier Reef: assessing past changes using oyster bed deposits
This paper is short and easy and has a good graph of how corals, oysters and barnacles were used to understand ancient sea levels.
Post-glacial sea-level changes around the Australian margin: a review
This paper provides the full story but is rather heavy.