Vinga (Gothenburg)

Vinga is a small island 10 nautical miles (19 km; 12 mi) outside Gothenburg's harbour entrance in Sweden. The 19th century Vinga Lighthouse is noted, not only as a beacon in the waterway of the Swedish west coast, but also as the place where the Swedish poet laureate Evert Taube grew up. Today Vinga is a tourist attraction, with boats to and from Gothenburg harbour.[1]

Vinga island in May 2013.

Geology

The bedrock of Vinga is mostly made up of porphyrite (porfyrit), a volcanic rock with less Silicon dioxide, SiO2, than porphyry. The rock has a fine-grained structure, dark with lighter grains of feldspar and other minerals. The mineralogical composition of the Vinga porphyry classifies it as a monzogranite or quartz diorite. The northern part of the island contains orthopyroxene. The Vinga porphyry was created about 950 million years ago, when it penetrated the surrounding older gneiss rock.[2]

gollark: The closer you pass by a piece, the more distance quota it takes.
gollark: Anyway, each piece can move some total distance in a line each turn defined by what piece it is, and if there is a piece which can block it near the path it'd take, it uses more of that distance quota to move on that path.
gollark: No, it's still turnbased.
gollark: Yes, but in continuous chess it can't, I'll explain.
gollark: If your path goes near a piece, it goes "slower" there.

References
  1. "Vinga – Porten till Göteborg och Västkusten" [Vinga – Gate to Gothenburg and the West Coast]. www.vinga.net. Vinga.net. Retrieved 24 August 2015.
  2. Årebäck, H; Andersson, UB; Petersson, J (2008). "Petrological evidence for crustal melting, unmixing, and undercooling in an alkali-calcic, high-level intrusion: the late Sveconorwegian Vinga intrusion, SW Sweden". Contributions to Mineralogy and Petrology (93): 1–46.


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