Here is a detailed Calamites fossil of the species Annularia spinulosa from the lower Permian of Illfeld in the Hercynian Mountains of Germany. | |||
Location: | Ilfeld, Harz (Hercynian Mountains), Germany | ||
| Size of matrix: | about 84 x 67 mm | ||
| Age: | Lower Permian, Rotliegend, Netzkater Formation (about 296 Ma) | ||