Is this a stromatolite?

[Rosemary]

Is this sample from northcentral Indiana a stromatolite? Thanks in advance!

[Archie]

It does look very similar to some stromatolites Ive seen in the Lower Carboniferous/Mississippian here in Scotland, however I'm wondering if it could also potentially be a soft sediment deformation structure. Are stromatolite fossils known from the formation from which you collected it? Either way its a lovely piece it would look great polished.

[Rosemary]

I don't know if anyone has found a stromatolite around here. I'm adding two more pics in case they help.

[Archie]

Its hard to tell, it might be worth looking up any literature available on the local geology of the area you found it to see if stromatolites are present.

[Shamalama]

Can you get a closer view of the cut side of the rock, possibly while wet so we may see if there are more details in the swirls?  An interesting find for sure.

[Rosemary]

Here's the first wetted and with macro lens

[Rosemary]

A second wetted and macro lens

[Shamalama]

Ok, your second picture has convinced me that it could be a Stromatolite. I see banding, and mounding in the lighter colored areas.  I'm thinking it was a Stromatolite that lived in an area that got infrequent sediment deposits, like during a flood event, temporary change of current, or a storm.  The darker areas look like sediment that was washed over portions of the Stromatolite but other areas were left uncovered and it continued to grow and rebuild.

[Rosemary]

Thank you!

[abyssunder]

It looks like stromatolith to me also.:)

[Rosemary]

Thanks!