Rock having goosebump

[Denis Arcand]

 I found this while fossil hunting see my post The day I went fishing for fossils.

 

I'm wondering what it is , it's between 4 and 6 inches I guess, didn't have an rule with me at that time

.

 

Edited November 30, 2021 by Denis Arcand

[kgbudge]

It looks a little like raindrop impressions. They're uncommon but not unknown.

[westcoast]

Interesting. they are a bit like Lockeia, a bivalve resting trace, but not quite the right shape...but that may be because the sandstone is quite coarse-grained. They are not raindrop impressions.

[JesseKoz]

Did you have any information on the location if this find? Possibly geological formation? 

 

Looks like some kind of bioturbated material. I have some similar impressions from Cambrian aged material, containing trace fossils of what I believe are some kind of marine worm.

[Rockwood]

I suspect this could be pyrite. If so, a museum curator would view it as pyrite disease waiting to happen.

[Fossildude19]

I believe the area is Ordovician in age, going by the other fossils found.

[Kane]

The OP states it is Nicolet Fm, which is upper Ordovician in age.

 

My first instinct was stromatoporoid, but the "mamelons" seem too widely spaced. That being said, in general, a sponge may not be entirely out of the question.

[FossilNerd]

9 hours ago, Kane said:

My first instinct was stromatoporoid, but the "mamelons"

Strom mamelons was my first thought as well. 

[Denis Arcand]

9 hours ago, Kane said:

My first instinct was stromatoporoid, but the "mamelons" seem too widely spaced. That being said, in general, a sponge may not be entirely out of the question.

 

35 minutes ago, FossilNerd said:

Strom mamelons was my first thought as well. 

 

That is great, it's the fist specimen I found whichever it is. Wish I could take it to my collection.

 

I look at some picture on the web, and it really look like stromatoporoid. Will that help differentiate stromatoporoid from sponge, if I take another picture with a rule this time. I might have to wait the weekend to do that

 

Thanks you all! really appreciate all the comments

[Denis Arcand]

On 11/29/2021 at 7:48 AM, Kane said:

My first instinct was stromatoporoid, but the "mamelons" seem too widely spaced. That being said, in general, a sponge may not be entirely out of the question.

 

HI @Kane, I went back and toke more pictures, I have included a rule in the picture this time. are the "mamelons" to widely spaced to be stromatoporoid? 

 

 

Here's a picture of the complete fossil.

 

Edited December 5, 2021 by Denis Arcand
text corrections

[Kane]

They may not be too widely spaced, but I will admit that stromatoporoids are not my focus or forte (they just get in the way of finding trilobites.  ). 

[Denis Arcand]

31 minutes ago, Kane said:

 (they just get in the way of finding trilobites.  ). 

 Good one, I fully understand, I love those critter.

 

[fifbrindacier]

I agree those cob be stromatoporoids.

@Spongy Joe?