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northnjhiker

Thinking I found a fossil? Colorado

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northnjhiker

Hi everyone.  I found this extruding from a hillside on Green Mountain near Golden, CO. It is in the Green Mtn Conglomerates formation. Lots of little petrified wood around.

 

Color or is white with some slight red marks. There are small pores but different than what I see with a lot of pet wood. Any help would be great. 

https://imgur.com/tpVtjNR

https://imgur.com/tfv8lO3

https://imgur.com/qFxG2c7

https://imgur.com/FKz5Mr0

https://imgur.com/wwYlheE

 

geology info:

https://imgur.com/tiAh2ok

 

 

Edited by northnjhiker
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Kane

Could you post the images here? As the site is archived, it is important that third party links for photo IDs not be included as those have a tendency to expire, removing the context of the thread for future readers.

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Fossildude19

Posting pictures here for posterity, when the imgur links expire. 

 

To me, it looks like a mineral vein running through the rock. Quartz or calcite.

 

qFxG2c7.jpg  tfv8lO3.jpg

 

FKz5Mr0.jpg  wwYlheE.jpg

 

tpVtjNR.jpg  tiAh2ok.jpg

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northnjhiker

Thanks for reposting. I thought the vein might be quartz filling an old crack in the bone. Like it does with gaps in petrified wood. 

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Misha
54 minutes ago, northnjhiker said:

Thanks for reposting. I thought the vein might be quartz filling an old crack in the bone. Like it does with gaps in petrified wood. 

Nothing in those pictures to suggest that the piece is bone, I also don't think quartz can be found along with bones at least in the way you are saying.

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Mark Kmiecik

I don't see any evidence of bone or wood in the photos. Of course it's not the same as seeing it in person, so I can't be 100% sure, but from what I can see I'm inclined to say it is purely geological in origin.

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Bronzviking

I agree it's a wide mineral filled vein in a rock, not a fossil. See the spider web veins running next to it? Here's a good example of quartz veins in rocks.

quartz veins.jpg

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northnjhiker

I have to say I disagree with the opinions that it is a rock. I’m a pretty seasoned geologist and this is not a rock. Can you guys give any sort of info in what rock you think it is? And reasons and visual clues? Thanks 

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Rockwood

I'm a landscaper, and it looks like a rock to me. :)

I'd say it was near the oven that that gneiss was baked in.

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Rockwood

Oh and it lacks the cubes, rays, and circular structures to be wood.

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northnjhiker
Just now, Rockwood said:

Oh and it lacks the cubes, rays, and circular structures to be wood.

Buddy what does that even mean? I said it wasn’t wood. And gneiss has a lot of small sand grains, often mica, metamorphosed into a very hard rock. This is crumbly. It also has no mica or meta- sand grains. How did you come to your conclusions?

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Kane

I wonder, given the smooth surface, striations and direction, if this might be a slickenside. I'll tag @ynot on this. 

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Rockwood
3 minutes ago, northnjhiker said:

Buddy what does that even mean?

To me it means it has no diagnostic features of it being petrified wood.

It simply looks like metamorphic rock to me. I didn't say it was gneiss.

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ynot

Looks like a fine grained sandstone or siltstone, with a mineral vein in it.

I do not see any indication of bone (or other fossil) here.

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SailingAlongToo

From the photos posted, definitely looks geological to me rather than biological.

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-AnThOnY-

Just a mineral vein running through a rock. No fossil.

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Mark Kmiecik
3 hours ago, northnjhiker said:

I’m a pretty seasoned geologist and this is not a rock.

A seasoned geologist knows that most fossils are rock. This sentence contradicts the claim it makes. It's in itself a non-sequitur.

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Ludwigia
11 hours ago, northnjhiker said:

I have to say I disagree with the opinions that it is a rock. I’m a pretty seasoned geologist and this is not a rock. Can you guys give any sort of info in what rock you think it is? And reasons and visual clues? Thanks 

Can you please give us more details to support your statement that this is not a rock. All we have to go on are a few photos.

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Plax

I've seen heavily mineralized bone with mineral veins in it. The only easy way to tell it was a bone was that it was an identifiable bone element from a known vertebrate fossil site. Busted up this would just look like a rock. This looks like probable bone to me. It doesn't look like any of the rocks described from the site and certainly not sandstone or siltstone. We all opine based on our experience. Perhaps we have someone on here with experience with Triassic or Jurassic bones? 

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JohnJ

@northnjhiker

Better images of the cleaned, interior broken surfaces (posted here) would be useful to a better understanding.   

 

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Bronzviking
11 hours ago, Plax said:

I've seen heavily mineralized bone with mineral veins in it. The only easy way to tell it was a bone was that it was an identifiable bone element from a known vertebrate fossil site. Busted up this would just look like a rock. This looks like probable bone to me. It doesn't look like any of the rocks described from the site and certainly not sandstone or siltstone. We all opine based on our experience. Perhaps we have someone on here with experience with Triassic or Jurassic bones? 

Do you have any photos of mineralized bone with mineral veins in it to show us? Thanks.

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Bronzviking

@northnjhiker can you take some zoomed in shots so we can look at it more closely? Also, do you have any petrified wood samples from the same area to make a comparison? Thanks.

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Plax
On 5/16/2019 at 7:21 PM, Bronzviking said:

Do you have any photos of mineralized bone with mineral veins in it to show us? Thanks.

google "agatized dinosaur bone". Several picks there with mineral veins. I think that the OP has it right though that it is a mineral filled crack in a bone. the OP has already stated that he  knows pet wood and it's listed from the site. the literature cited also lists dinosaur bone as being found there.

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Rockwood
On 5/16/2019 at 7:50 AM, Plax said:

We all opine based on our experience.

I for one am glad to have your experience around in times like this.

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