Possible Stromatolite fossil???

Stromatolites are defined as laminated accretionary structures that have synoptic relief (i.e., they stick up above the seafloor). Stromatolite-building communities include the oldest known fossils, dating back some 3.5 billion years when the environments of Earth were too hostile to support life as we know it today.

you will normally find the interlayring of the fine sediments and cyanophytes (primarily) If you are able , in your sampl to look at it under a scope (are you familiar with thin sectioning?) you can see the masses of the cyanophytes and the sediments. They generally are domal or flatly convex toward the paleo sky (Thats why their are good indicators of "up" and "down" in folded limestones. Many times, in one type of habit, they can be confused with a wholly sedimentary body called a stylolite. (Stylolites have nothing to do with being a fossil, but are a contact zone between two different kind of seds that are undergoing compression.

Thanks to the both of you!!! Here is a link to a picture of them I wish they had better contrast but of course they are formed from the same sedimentary rock that surrounds them.

https://ibb.co/0MkV46W