9. Landhöjning
Under den senaste istiden var våra trakter täckta av ett tre km tjockt istäcke - inlandsisen. För 10 000 år var det mesta av inlandsisen avsmält. Tyngden av inlandsisen hade pressat ned jordskorpan. När trycket från isen minskade, började jordskorpan höja sig och återta sin ursprungliga form. Den processen pågår än idag och kommer att fortsätta ytterligare 9. Land uplift. During the latest ice age our region was covered by a three km thick ice cap. Ten thousand years ago most of the ice had melted. The weight of the ice had pressed down the earth’s crust. Once this pressure diminished, the earth’s crust began to rise and re-assume its original shape. This process is still going on and will continue another ten thousand years. In this area, the land currently rises by almost one centimeter per year. Six thousand years ago a skerry with flat rock began to to appear above the surface of the water. This became the top of the mountain, known as Hemberget, which we will be passing later on. The height of Hemberget is one hundred meters above sea level. It took more than a thousand years until the shoreline moved from the point at which we are standing, down to the forest ditch we left a while ago. |
Uppdaterad 22 Maj, 2021