peruskallios
Peruskallio is a Finnish term referring to the Precambrian bedrock found in Finland. This bedrock forms the geological foundation of the entire country and is a significant part of the Fennoscandian Shield, a vast area of ancient crystalline rock in Northern Europe. The peruskallio consists primarily of igneous and metamorphic rocks, such as granite, gneiss, and amphibolite, which were formed over a billion years ago through processes of magmatic intrusion and intense geological activity.
The distribution of peruskallio is widespread across Finland, with some areas exhibiting more exposed bedrock than