Unfortunately, it is usually impossible to tie bioturbation to any specific organism. 12. Dwellings and structures: Some marine worms secrete calcareous tubes in which they live. The fossil is not of ...

The oldest fossils are remains of marine organisms that populated the ... bones, shells, or wood -- were preserved. Fossils can be formed in several ways. Buried bone and shell contain tiny ...

A ferocious-looking fossil fish has been unearthed ... Interestingly for a marine setting, there is also fossilised wood and insects in the clay layer, suggesting land was not that far away.

Sally Hollingworth and her husband Neville were hunting for marine fossils in Wiltshire when they ... Mrs Hollingworth said they first spotted a "wood-like structure" sticking out of the ground ...