From the Permian period onward the Variscan mountain belt eroded .
From the Permian period onward the Variscan mountain belt became partly covered by younger sediments , with the exception of Variscan massifs like the Bohemian Massif .
From the Permian period onward the Variscan mountain belt eroded and became partly covered by younger sediments , with the exception of Variscan massifs like the Bohemian Massif .