Take a walk the Alkkianvuori geotrail. This section is the added content for the info panels.
Granitic bedrock (Alkkianvuori, Other areas)
Granite forms by crystallising from molten stone. Its formation takes millions of years, because crystallising deep underground is very slow. That is why the mineral grains are so large that they can be seen with the naked eye.
Granite consist mainly of potassium feldspar, quartz, and mica. The potassium feldspar gives the rock is reddish colour, the quartz its hardness.
Although granite is a durable rock, it does break and crumble in the right conditions. Weathering slowly crumbles all the stones on the Earth. When given hundreds of millions of years of time, it can even out the greatest of mountain ranges.
Even Alkkianvuori has been covered by more than ten kilometres of rock that has since disappeared.
Coordinates (WGS84): 62.16484, 22.86258