Crinoid calyx preserved in Wenlock Limestone,this limestone was deposited in tropical coral reef conditions during the Silurian Period 443.8–419.2 million years ago. There are 2 different species of crinoid shown here Sagenocrinus expansus and Gissocrinus goniodactylus | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Stammers, Sinclair |
Taille de l’image : | 3420 px × 5125 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |