Fossil Impression Magnified

[Felinepeachy]

I'm sure all you fossil collectors see pics like this all the time but patterns in nature fascinate me and this one is really cool.

[huntress104]

pretty cool Peachy. looks like a piece of sponge or coral.

[Felinepeachy]

Yeah it kind of does. It's just one of the many rocks and things I've dragged home over the year

[Harry Pristis]

I think this may be Receptaculites, a calcareous algae. These are sometimes called "sunflower coral," a mis-nomer.

The rows of knobs are the stubs of tubules connecting the two surfaces of the algal colony.

Here's the wikipedia link: http://en.wikipedia.org/wiki/Receptaculites