Around 280 Ma the Variscan orogeny mountain-building period occurred, again due to collision of continental plates, causing major deformation in south west England.
32.
Southwestern Wales, in particular, was affected by the Variscan orogeny, a period when continental collisions further south caused complex folding and fracturing of the strata.
33.
According to the prevailing theory, it took some 320 million years of the Variscan orogeny for the continental collision of Laurasia and Gondwana to crush the Armorican continent.
34.
The Variscan orogeny removed the upper schist layer from all the massif's peaks but Monte Arcosu, modelling it and showing the granite along the steep slopes.
35.
At the close of the Variscan orogeny, Iberia was still connected to northwestern France ( the Armorican Massif ) and most likely was a northwestern prolongation of Aquitania.
36.
The Variscan orogeny involved lateral compression of the rock sequence resulting in the tight folding, fracturing and faulting of the sandstone and mudstone strata, and the associated Coal Measures.
37.
It was compressed in the Variscan Orogeny, extended in the Mesozoic so that resulting basins filled with sediment, compressed back and lifted up in the Cretaceous, then eroded.
38.
These crustal accretion events produced the present day regional lithosphere, and by the time of the post-orogenic collapse of the Variscan Orogeny the supercontinent Pangea had completely formed.
39.
The raised beach of wave-cut platforms has been created by changes in sea level of the Bristol Channel since the strata have been tilted and compressed during the variscan orogeny.
40.
The east of the commune is on the Limousin plateau-the western part of the Massif Central-which is composed of crystalline and metamorphic rocks-relics of the Variscan orogeny.
