The block field is composed of rocks and stones in the stream bed from Bäckaskoga göl. The rocks ( larger than 20 centimetre in cross section) and the stones (2 - 20 centrimetre) where once transported by the inland ice that with a powerful flow of melted water took sand and gravel with it, leaving only larger stones. This dates back to 11 000 years ago. The effect of frost after a long time pushed the rocks and stones further out of the earth and have formed a layer  of round stones pushed and rubbed together. They are called boulders and have given name to the boulder ridges in Sweden. Cracked and edgy rocks are formed by frost and cold weather.

In the summer you can not see any water but you can hear ripple's of water under the stones. The source of the water comes from lake Arasjön.

Do you want to know the exact position of the block field, push  here and search for the sign E6