0 a substance like rock, formed in the sea by groups of particular types of small animal, often used in jewellery -- 珊瑚
There are new chapters on corals, ser pulid worms and nautiloids, three groups left out of the first edition.
Large, overturned tabulate corals are found in similar facies in the south-eastern quar ry wall.
Tikal corals are never described as modified, suggesting that they were ritually impor tant in and of themselves, and their ritual function is far from clear.
Then, the other groups: conodonts, acritarchs, chitinozoa, corals, brachiopods, cephalopods, bivalves, trilobites.
In contrast, coquina accumulations are common along the upper bedding planes, where they are formed by bivalves, productid brachiopod shells, fenestellid bryozoans, small solitary corals, crinoid stems and blastoids.
The dominant colonial organisms are corals.
Finally, on the question of corals, there is no doubt that red and pink corals have been overharvested in many regions of the world.
Deep-sea trawlers were accused of systematically destroying the corals.
