<p>You have a nice stromatolite fossil.</p>

<p>A stromatolites are layered bio-chemical accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilms (microbial mats) of microorganisms, especially cyanobacteria. stromatolite fossils can be some of the oldest fossils found on earth. Living stromatolites can still be found today.
 (<a href="https://en.wikipedia.org/wiki/Stromatolite" rel="nofollow noreferrer">Wikipedia</a>).</p>

<p>This pattern on the underside of a stromatolite fossil is very characteristic.
<a href="https://i.sstatic.net/lPjl0.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/lPjl0.jpg" alt="enter image description here"></a></p>

<p>Cretaceous age stromatolite fossils from Morocco are commonly found for sale online. (<a href="https://www.etsy.com/listing/527211575/huge-almost-6-lbs-stromatolite-fossil?ref=search_recently_viewed-1" rel="nofollow noreferrer">Esty</a>)</p>

CC BY-SA 3.0
2017-11-26T12:11:13.930Z
2017-11-26T13:07:47.713Z
2017-11-26T13:07:47.713Z
Earth Science Expatriate
<p>Looks similar to stromatolite.</p>

CC BY-SA 3.0
2017-09-26T17:16:14.510Z
More detail would improve this answer
Fred
CC BY-SA 3.0
2017-09-26T17:02:28.553Z
2017-09-26T17:02:28.553Z
Gabija
<p><img src="https://i.sstatic.net/gZ5qK.jpg" alt="enter image description here"></p>

<p>We found this rock at a mineral and jewelry store. The gal wrote down what it was and we cannot find what we think she wrote on the internet anywhere. She wrote Mcstrodlite.<img src="https://i.sstatic.net/NjNxp.jpg" alt="![enter image description here"></p>

<geology><fossils>
Is this a fossil we found in a store?
Gmc
# Is this a fossil we found in a store?

(Asked by: username_0 on 2017-09-26)

![enter image description here](https://i.sstatic.net/gZ5qK.jpg)

We found this rock at a mineral and jewelry store. The gal wrote down what it was and we cannot find what we think she wrote on the internet anywhere. She wrote Mcstrodlite.![![enter image description here](https://i.sstatic.net/NjNxp.jpg)

**Tags:** geology, fossils


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## 2 answers

### Answer by username_1 on 2017-11-26. Score: 2

You have a nice stromatolite fossil.

A stromatolites are layered bio-chemical accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilms (microbial mats) of microorganisms, especially cyanobacteria. stromatolite fossils can be some of the oldest fossils found on username_1. Living stromatolites can still be found today.
([Wikipedia](https://en.wikipedia.org/wiki/Stromatolite)).

This pattern on the underside of a stromatolite fossil is very characteristic.
[![enter image description here](https://i.sstatic.net/lPjl0.jpg)](https://i.sstatic.net/lPjl0.jpg)

Cretaceous age stromatolite fossils from Morocco are commonly found for sale online. ([Esty](https://www.etsy.com/listing/527211575/huge-almost-6-lbs-stromatolite-fossil?ref=search_recently_viewed-1))


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### Answer by username_2 on 2017-09-26. Score: 0

Looks similar to stromatolite.

> **Comments:**
> **username_3**: More detail would improve this answer  

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