Couple fossils.

[choo]

I found these fossils in the creek I was hunting for indian artifacts but found these , can anyone tell me what I found ?

 

[BeachComber7]

Hey those are really good! Congrats!

 

[Harry Pristis]

The small one appears to be the internal mould of a gastropod, and the large one likely is favrosities, a horn coral. If you know someone that has a small rock saw, the horn coral cut down the long axis and polished would show stunning detail of tiny chambers.

Merlin

'Moonrover' is probably correct about the spiral form.

Favosites, if that is the reference, is a "honeycomb coral." Coralla of this genus typically form dome structures that my reach a meter or more in diameter.

The plump object seems to be a solitary rugose coral. I have never seen one cut down the long axis, but they are commonly cross-sectioned for identification purposes.