Abstract
Part I.—Following a brief comparison of the British and Franco-Belgian developments, the variable facies-development in the synclinal belts as traced through Armorica, the Central Massif and the Montagne Noire Pyrenean region, is discussed. Further south, the development in the Asturias is related to the Moscovian province, while the faunas of the North African outcrops are shown to be related to those of North America. Part II.—A synthesis of the data for the repeated advances and retreats of the seas from the Mediterranean region across the Massifs of West Europe is given. Similar movements also took place in Asturias and North Africa, and it is concluded that the major Massifs delineated in Caledonian and Pre-Cambrian times, have operated as positive units from early Devonian times onwards.
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