Norrland terrain

[2] The southern and eastern boundary of the Norrland terrain is made up of geological faults that disrupt the Sub-Cambrian peneplain found the lowlands.

[3] In some locations these faults have been extensively eroded making the Norrland terrain boundary partly a result of erosion.

[3] Karna Lidmar-Bergström categorizes the Norrland Terrain into the following classes:[2] From the south the entrance to the Norrland terrain is not only seen in the relief but in the vast and contiguous boreal forests that extend north of it.

For example, the boundary coincides with the northernmost extension of natural grown oaks.

The phytogeographical boundary is not fully sharp as valleys of the Norrland terrain constitute transition zones for vegetation.