The coral rock of the inner belt is now dissolved by sea water and scoured out by tidal currents until it gives place to a gradually deepening ship channel, while the outer margin is left as a barrier reef.
Thus a barrier reef may be formed by the seaward growth of a fringing reef upon the talus of its sea face.
And if, instead of this being an island, it were a great continent like Australia, then you will have the phenomenon of a barrier reef which I have described.
That is a barrier reef; but a barrier reef is merely as it were a fragment of an encircling reef running parallel to the coast of a great continent.
The outer edge of a barrier reef is much farther from the shore than that of a fringing reef, and the channel between it and the land is much deeper.
The lower part of the figure represents a barrier reef surrounding a central peak.
The outer wall of a barrier reef is steep, and frequently, though not always, descends abruptly into great depths.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "barrier reef" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
