Geology of Sweden
Sweden is part of the the Fennoscandian (or Baltic) Shield.
This is a huge craton, an area of old crystalline and metamorphic rocks,
consolidated during hundreds of millions of years.
Commmon rocks are gneiss, granite, granodiorite, sandstone and marble.
There are a few patches of marble, dolomite and limestones with a few caves.
There are numerous tectonic or neo-tectonic caves.
But the basic thing about Swedens' underground are numerous important mines,
with Kiruna Iron Ore mine being the most well known.
See also