Metamorphic rocks are created when other types of rock ... There is a rock called Lewisian Gneiss in this area, the oldest rock in Western Europe. The same rock type is found in Canada and ...

It is unresolved whether the gneisses are basement rock to the metasedimentary complex or whether the two complexes represent one protolithic package with the gneiss a higher metamorphic grade ...

“When we got close to the rocks in the quarry, we could see their banding was typical of Lewisian gneiss,” says Paul. Lewisian gneiss is metamorphic rock, which means it was formed by being heated up ...

Samples from the Cap a l’Est Gneiss Complex are also examined in this study. Metamorphic age peaks at 1060 ± 7.3 Ma ... and show that there are several pulses of metamorphism preserved in these rocks, ...

The retreat of the Fennoscandian Ice Sheet exposed the bedrock and its potholes, which are made of gneiss, a type of metamorphic rock with colorful mineral bands that add to the fantastical ...