Jump to content
Gerde

Stromatoporoid?

Recommended Posts

Gerde

New to the Forum! Just a rookie looking for some help. This fossil was found just outside of Defiance, Ohio 70 yrs ago. The rock was found on the surface of a farm field, in an area not plowed.  Rock is approx 8 inches in length, with its entire surface uniformly covered in bumps. Under magnification, very small crustacean type organisms can be seen embedded in the rock. At first, I thought it may be a stromatoporoid, but bumps on surface may not have enough of a conical shape....?  Looking for advice on where in N.W. Ohio this could be taken for ID, if needed.

 

 

 

 

 

 

Fossil max magnification.JPG

Fossil picture 1.JPG

Fossil size.JPG

 

 

 

Increased magnification.JPG

 

Edited by Gerde
remov ed duplicate pictures

Share this post


Link to post
Share on other sites
abyssunder

Welcome to the Forum! :)
It's an interesting specimen.
Has a concave surface on one side? Can we have a picture of that?

Share this post


Link to post
Share on other sites
Bronzviking

Do some research for Devonian Reef Fossils. I found this Devonian fossil tabulate coral which could be a worn coral that you have.

image.png.dbdab90b0a2f50c02c2e92621335bcf5.png

Share this post


Link to post
Share on other sites
Gerde

Thanks due the input and questions!

 

Abyssunder....There is not any concave side. The rock is somewhat football shaped, and all sides really look very similar. 

 

Bronzviking.. Thanks for the tip. I'll look further into that coral. 

 

Does anyone know of an institution in N.W. Ohio that might be able to offer insight into a fossil such as this? 

Share this post


Link to post
Share on other sites
Herb

I am not seeing a fossil here

Share this post


Link to post
Share on other sites
DPS Ammonite

I think that this might be a piece of limestone that has been eroded in a sort of mini karst. Does the rock scratch with a knife blade? Does it fizz in acid? I also see possible pieces of shell or phylloid algae. Better up close photos may help us decide.

FABFB5A6-1DF6-43CC-956C-52B5D0173805.jpeg

Share this post


Link to post
Share on other sites
minnbuckeye

@Peat Burns may know where to take it

Share this post


Link to post
Share on other sites
abyssunder
3 hours ago, DPS Ammonite said:

I think that this might be a piece of limestone that has been eroded in a sort of mini karst.

That was my first impression too.

If there is no lamellar character with pillars in a cross section, no clear astrorhizae on the top, no flat or concave shape at the bottom, no concentric structure visible at the base, I think it can't be similar to stromatoporoids, but I could be wrong.

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Recently Browsing   0 members

    No registered users viewing this page.

×