Theme 176.
Another from the Science Museum - one of the first things I saw. I took a photo of the information plaque (as I did with a lot of the exhibits I photographed), and then I could see and write down the information afterwards. This is what the note said for this exhibit:
Rock Circles
The spectacular concentric circles in this rock are sections through spherical structures formed by the crystallisation of layers of different minerals around tiny cores. The rock crystallised from molten magma, but exactly how these structures are produced is not clear - several different theories have been suggested. Cut and polished, the rock makes a spectacular building stone.
The spectacular concentric circles in this rock are sections through spherical structures formed by the crystallisation of layers of different minerals around tiny cores. The rock crystallised from molten magma, but exactly how these structures are produced is not clear - several different theories have been suggested. Cut and polished, the rock makes a spectacular building stone.
2 comments:
A great pattern produced by Mother Nature! I like the black and white a lot...
How beautiful! The pattern reminds me of petoskey stone, found on the beaches in and around Petoskey, MI. We used to collect and polish them when we were kids. Wikipedia
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