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Fossils from Norway, Fossil ID.


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Hello guys and girls, I'm new here :-)

 

Could you help me identify these fossils. They are all from my local city of Porsgrunn, Norway.

 

I gathered these over the cause of a few days due to construction work, so I saved them before the whole area is buried under tons of rubble.

The first fossil (1-2) around the size of a finger, the "branch" was much longer before I broke it lose, around half a meter.

Image 3-5 is the one I am most curious about, could it be a trace fossil of some sort. It's embedded in the shale, some of the lines are 0,5 cm deep.

From what I know Image 6 is most likely a Ragusa coral, and Image 7 is probably Stromatolites. The last fossil looks like it fell out of a geode at some point. :-)

 

Most of the local fossils here in Porsgrunn can usually be dated to the Ordovician or early Silurian and they are relatively small in size.

Porsgrunn in Telemark is a part of the Oslo Geological Field in Norway, which is a part of the Burgess Shale. The fossils in the

Oslo Geological Field can be dated to around the Precambrian era to late Silurian.

 

Thanks  :-)

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Wrangellian

Welcome to the Forum.

Interesting stuff.. I don't think all of them are fossils, but #1 might be crinoid stem, I'm not sure. #3-5 I suspect is geologic - I have picked up similar rocks from creeks/rivers, and my guess is it's a piece of metamorphosed slate or similar that has been differentially eroded.

#6 is interesting. Looks like stromatolites, but maybe just concretions? I would keep it, either way.

#7 maybe fossil?

#8 as far as I can tell is geologic.

Other members might be able to provide more insight, let's wait and see.

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WhodamanHD

Agree with @Wrangellian fully, the last one looks like limestone that's been dissolved by water, this may be the case with the one with lines as well.

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doushantuo

i think i see "Collenia " in there

Oslo "part of the Burgess shale"?

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Thanks you guys :-)

 

I suspected the second one was a concretion.

Here is a picture nr. 6 I think there is algae growth, and the underside of nr. 7

 

I thought I read somewhere that Oslo was a part of the Burgess shale :-p

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18217490_1411169868939878_48263576_n.jpg

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Wrangellian
10 hours ago, doushantuo said:

Looks like an excellent paper. I guess the reference to Burgess Shale was because of the association with the similarly-aged Alum/Orsten Lagerstatten?

9 hours ago, Pottery said:

Thanks you guys :-)

 

I suspected the second one was a concretion.

Here is a picture nr. 6 I think there is algae growth, and the underside of nr. 7

 

I thought I read somewhere that Oslo was a part of the Burgess shale :-p

18817045_1437464632977068_1607508114_n.jpg

18217490_1411169868939878_48263576_n.jpg

The last one looks like a horn coral, but it's still hard to tell. It might help if I knew more about the geology of the area it came from but I don't know where to find that information. Your stones look like they could come from a range of formations/ages.

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13 minutes ago, Wrangellian said:

Looks like an excellent paper. I guess the reference to Burgess Shale was because of the association with the similarly-aged Alum/Orsten Lagerstatten?

 

Yes I think that's the case :-)

 

I'm new to all this and I browsed through a few books at the library, I got the reference wrong, it's very exciting though, I've always known about the shale fossils but the mudstone/chalk and mineral ones were new to me :-)

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