A fossil crinoid,Pentacrinites fossilis,showing the stem with numerous root-like cirri and the long main arms of the crinoid "head". At one period in prehistory,"meadows" of such crinoids grew on the floor of a warm shallow sea that covered southern England. This specimen,found in Lyme Regis,Dorset,in the UK,has been replaced by the brassy-looking mineral pyrite (iron sulphide) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Land, Martin |
Taille de l’image : | 3676 px × 4961 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |