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Fossilised plants ?

 
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Sigra
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PostPosted: Tue Jun 11, 2013 9:08 pm    Post subject: Fossilised plants ?

Hi to everybody,

Im really glad this forum is back ! Grazzi !

In Floriana I found these pavement stones.
Now, I wonder, are these "patterns" artificial and of no importance or are these fossilised plants? And if so, do you happen to know what plant this is?

Thank you



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PostPosted: Wed Jun 26, 2013 1:03 pm    Post subject:

They are really interesting indeed, but I think they are artificial (or non native ) for two reasons:

Malta rock originated and developed under the sea (Coraline and Globigerina limestone) and so it is impossible to feature fossilized plants as in rock found in tropical regions. I don't think those are any algal/marinr species

Secondly, if they were truly fossils, they would be quite valuable and would never be used as a pavement.

So I think they are embellishment stones...

Despite this I can say that I am 99% sure but not 100%

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Sigra
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Joined: 19 Oct 2008
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PostPosted: Sat Jun 29, 2013 4:00 pm    Post subject:

Thank you for your considered answer. Grazzi!

However, I did some more "googeling" and found the following explanation:


http://en.wikipedia.org/wiki/Dendrite_(crystal)
Mineralogy and palaeontology

In palaeontology, dendritic mineral crystal forms are often mistaken for fossils. These pseudo fossils form as naturally occurring fissures in the rock are filled by percolating mineral solutions. They form when water rich in manganese and iron flows along fractures and bedding planes between layers of limestone and other rock types, depositing dendritic crystals as the solution flows through. A variety of manganese oxides and hydroxides are involved, including:
birnessite (Na4Mn14O279H2O)
coronadite (PbMn8O16)
cryptomelane (KMn8O16)
hollandite (BaMn8O16)
romanechite ((Ba,H2O)Mn5O10)
todorokite ((Ba,Mn,Mg,Ca,K,Na)2Mn3O123H2O) and others.
A three-dimensional form of dendrite develops in fissures in quartz, forming moss agate.

In addition, I found here: http://woostergeologists.scotblogs.wooster.edu/2013/01/20/woosters-pseudofossil-of-the-week-manganese-dendrites-from-the-germany/
How can you tell this is not a fossil plant? For one, the branches are too perfect: none overlap or are folded over or broken, as you would expect in a buried three-dimensional plant. Next, you will notice that all the branches extend from a line at the bottom of the image rather than from a single branching point. Finally, there is no distinction between branch, stem or leaf; instead, it is a fractal-like Distribution of tiny sharp-edged crystals.


Tislijiet minn Mandelbrot
Sigra
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PostPosted: Sun Jun 30, 2013 7:43 am    Post subject:

Excellent research Sigra! Yes, this explains the fossil-like patterns in your images from Floriana. Interesting stuff, never thought of pseudo-fossils.

Thank you

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IL-PINE
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PostPosted: Wed Jul 03, 2013 4:14 pm    Post subject:

very interesting indeed. I still think they are patterns and man-made but
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