He accordingly retired into the solitudes of Pietralata, and subsequently founded with some companions under a rule of his own creation the abbey of San Giovanni in Fiore, on Monte Nero, in the massif of La Sila.
The apex is occupied by a massif of crystalline rocks.
Consisting of red sandstones, mudstones and conglomerates, they are inclined at high angles usually away from the granite massif and the encircling metamorphic rocks.
A syenite massif of this age occurs at Mittagong; and leucite has been discovered in Carboniferous basalts by David.
The southern flank is formed by the massif of the Reichensteiner Gebirge, which culminates in the Hochthor (77 80 ft.) and belongs to the north Styrian Alps, also called Eisenerzer Alps.
The following ranges belong to the Transmontane system, which is the southern extension of the mountains of Galicia: Peneda (4728 ft.), forming the watershed between the river Lima and the lower Minho; the Serra do Gerez (4817 ft.), which rises like a gigantic wall between the Lima and the Homem, and sends off a spur known as the Amarella, Oural and Nora, south-westward between the Homem and the Cavado; La Raya Seca, a continuation of Gerez, which culminates in Larouco (4390 ft.) and contains the sources of the Cavado; Cabreira (4196 ft.), which contains the sources of the river Ave and separates the basin of the Tamega from that of the Cavado; Marao (4642 ft.), Villarelho (3547 ft.) and Padrella (3763 ft.), forming together a large massif between the rivers Tamega, Tua and Douro; and Nogueira (4331 ft.) and Bornes (3944 ft.), which divide the valley of the Tua from that of the Sabor.
The principal folding took place towards the close of the Carboniferous period, and the massif is a fragment of an ancient mountain chain, the Variscische Gebirge of E.
Inland by a line of cliffs, the Susu Hills, which form the first step in the terrace-like formation of the interior, culminating in the massif of Futa Jallon, composed chiefly of Archean and granite rocks.
The passes at both ends of this snow-clad massif lie at altitudes of 15,990 ft.
The massif of Ararat rises on the north and east out of the alluvial plain of the Aras, here from 2 500 ft.