GeologyRockssponges
Sun, 02/17/2008 - 20:58 — psi
- Location: Seaford, Sussex, UK
- Date Taken (dd-mm-yy): February 2008
Although it may look like a brachiopod this is a sponge. Many flint nodules form around sponges in this Cretaceous chalk. The organic material in the sponge forms a "focal" point for silica to migrate to during diagenesis. The structure of the sponge can be seen close up. This nodule is about 25 mm across.
This work is licensed under a Creative Commons Attribution-No Derivative Works 2.5 License.
