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Are these real fossils or pseudofossils?


Noah

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Hello I found these at Frenchman MT Southern NV. Are these real fossils or fakies? I just recently found a trillobite body imprint there so I know that there are fossils there. If anyone wants a good fossil hunting place in Southern NV that is the place, it is owned by the BLM so you can take most fossils you find.

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Welcome to the Forum. :) 

I think they are Pseudofossils. 

They look like dendrites

Regards, 

    Tim    VETERAN SHALE SPLITTER

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"In every walk with nature one receives far more than he seeks."
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I agree !

" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

My Library

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Let's leave the politically charged comments at the door, please. :) 

Thanks. 

 

    Tim    VETERAN SHALE SPLITTER

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__________________________________________________
"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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1 hour ago, Fossildude19 said:

Welcome to the Forum. :) 

I think they are Pseudofossils. 

They look like dendrites

Regards, 

Aww to bad, thanks for the help. Its great to be here. :)

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I agree they are nice dendrites.

Welcome from France.:)

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"We only well see with the heart, the essential is invisible for the eyes."

 

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looks more like plant material to me. Have seen a lot of dendrites and they are usually more distinctive. Not saying they aren't dendrites; just saying I haven't seen them that look like this.

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"Let's leave the politically charged comments at the door, please. "

For some it's a emotional topic to deal with. My grandfather was killed by a dendrite falling on his head, while splunking in Virginia. To this day, my nan-na breaks down in tears when she sees any type of mineral crystalization.

"I haven't seen them that look like this. "

The geometry looks like manganese crystal growth to me. They do fade in and out, so I think the line of fracture is not following the plane of the dendrite. The dendrite has to be contiguous to grow properly, so it is likely diving above and below the fracture plane.

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On 11/29/2016 at 10:24 AM, tmaier said:

"Let's leave the politically charged comments at the door, please. "

For some it's a emotional topic to deal with. My grandfather was killed by a dendrite falling on his head, while splunking in Virginia. To this day, my nan-na breaks down in tears when she sees any type of mineral crystalization.

"I haven't seen them that look like this. "

The geometry looks like manganese crystal growth to me. They do fade in and out, so I think the line of fracture is not following the plane of the dendrite. The dendrite has to be contiguous to grow properly, so it is likely diving above and below the fracture plane.

I should have said I haven't seen them transecting multiple layers of rock. Usually they are on one bedding plane.

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I'm not familiar with the region, but if the place where the trilobite imprint was found is Frenchman Mountain Trilobite Quarry which is located on the east side of the Las Vegas Valley at the base of Frenchman Mountain,I think the chance for plant material could be very low. There are predominantly trilobites and tracefossils of the Cambrian period. The first land plants occurs in the Late Ordovician and they were spores, later, they began to diversity in the Late Silurian.

 

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Cross Section of Frenchman Mountain

" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

My Library

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