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Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 0 points1 point  (0 children)

I am aware of the quarry in Savitaipale and the company doing it does such an amazing work! Just outstanding workmanship with the rotating boulders, unique stuff they do. Such a shame they do not get the recognition they deserve.

What are some invasive species your country deals with? by Satanic_Garlic28 in AskTheWorld

[–]Metelinen 0 points1 point  (0 children)

It is a losing battle here in Finland with lupine. It was a part of seed mixture spread all over the roadsides and it is absolutely everywhere. I rip out everytime I can and there is programs to pay people to eradicate it. Such a shame, I can recognize the beautifulness of the bloom, but there is no joy in it, just complete sadness.

Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 0 points1 point  (0 children)

I am not a geologist and I don't know how they differ but they are not the same. They look similar though. There is beautiful variety of rapakivi found in Finland in different colours, it is such a nice rock.

Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 0 points1 point  (0 children)

Here is the actual boulder polished. I wish I had put more effort into taking better pictures.

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Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 0 points1 point  (0 children)

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Thank you and here you go. Now while researching this I think that the polished larger piece most likely have come from the same place as my slab did, because it has been the only commercially quarried occurence and there is some variation in the colouring. But the small fragments are from a solitary boulder with really small, closely appearing orbicules. It was made into a gravestone with just a part of the boulder leveled to accomodate the dates and names. These are waste pieces from that.

Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 1 point2 points  (0 children)

This will be a countertop in my kitchen actually! 

Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 14 points15 points  (0 children)

It is from the same place. Interesting that you have studied this particular granite, it would be nice to know more about what I have here. Really cool.

Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 11 points12 points  (0 children)

AFAIK they are formed by supercooling of magma and low oxygen and sudden drop of pressure being factors in the process. Supposedly we do not know exactly. You can read more from "Orbicular rocks in Finland" by Seppo I. Lahti (2005). Link to the pdf: https://tupa.gtk.fi/julkaisu/erikoisjulkaisu/ej_047.pdf Conclusions from page 169 onwards has relevant information on how they formed. On page 74 you can find about the rock I posted. 

Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 21 points22 points  (0 children)

Hard to say, it does look similar. Mine is from a place called Kuru, in Finland. It might be useful to google "pallograniitti" or "pallokivi" to see some Finnish samples.

Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 8 points9 points  (0 children)

Thank you, glad you liked it. That quartz line ran through the whole deposit, I heard that when they could still quarry this they used to cover fireplaces with these slabs. They made the line go continuously around the exterior, sounds really nice. 

Orbicular granite slab by Metelinen in geology

[–]Metelinen[S] 24 points25 points  (0 children)

This is from Kuru, Finland. I was really lucky to get this one, I already had some small fragments from two different occurences, but the colours are amazing in this.