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HORN CORAL (RUGOSE CORAL) - 400 million years old - Morocco

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Home > FOSSILS > FOSSILS FROM THE PRECAMBRIAN AND PALAEOZOIC ERAS
 
FOSSILISED HORN CORAL

A horn or rugose coral, an extinct solitary coral.

400 million years old
(Devonian period)

Morocco
 
Fossilised horn corals such as these from Morocco, have also been given the name ‘rugose corals’ because of their wrinkled appearance.  They lived in the Palaeozoic era before the age of the dinosaurs.
 
Corals such as these have used to establish the length of the year at the time they were living.  These corals added a tiny new layer of growth each day and by counting these bands and comparing them with modern corals it has been established that there were 400 days in the year in the middle of the Palaeozoic era, 380 million years ago.  This slowing of the spin of the Earth is due to the drag effect of the Moon and was as predicted by astronomers’ rough estimates.  It equates to a decrease of 2 seconds per every hundred thousand years.

Please note:  The photographs are typical examples of what we have.  You will receive the best example from our current stock.

Click on a picture for a larger image

Size: 4 to 6 centimetres long
Weight: varies

Price per coral

PRICE: £5.00