Abstract of ref. 1976:
Buildups with a rigid coral framework are generally rare in Lower Carboniferous time. An exception was found in the Hunts Bay
Oolite-Formation at Blue Pool Bay (Gower Peninsula). This bioherm is intercalated in well-bedded oolitic limestones. It is about 25 meters in
width and rises up to 10 meters in thickness. The coral association indicates an Asbian age of the bioherm. The core of the structure consists of
large massive colonies of Lithostrotion and a small number of dendroid colonies (Siphonodendron and Syringopora). Most of the corals are
preserved in living position. The density of the colonies is high, in many cases they grow upon eachother. Dendroid corals become more
common in the outer core. An increase of colonies, which are upside-down orientated, together with broken colonies and coarse debris
describe the facies of the flanks. The general decrease of the amount of corals and the gradual increase of fragments of colonies in bioclastic
rudstones to wackestones at the top of the structure characterize the end of the biohermal development. 

Due to the appearance of a coral framework and its thickness, the bioherm is wave resistant. It is described as the first ecological coral-reef of
the Lower Carboniferous of South Wales. 