Black Ordovician Rugose Coral

Superb presevation

Good colour contrast with matrix

Black Rugose Coral

Product description

This is an unusual Black Rugose Coral from Indiana, USA. The Rugosa, also called Tetracoralla, are an extinct species of coral that were abundant during the Middle Ordovician to the Late Permian, 460m to 270m years ago.
Rugosa were solitary corals, and were not reef builders.
Their skeletons were made of calcite and it is this that fossilised.
The majority of their nutrients came from algae, called zooxanthellae.
 
This is a highly recommended example of this extinct coral, with superb preservation.
 
Size:    14cms x 12cms