Geologic massif that covers a large area in the northwest of France
Location of the Armorican Massif on a structural map of the north of France. Hercynian massifs are olive coloured.Geologic map of the Armorican Massif and surrounding areas.
The Armorican Massif (French: Massif armoricain, pronounced[masifaʁmɔʁikɛ̃]) is a geologic massif that covers a large area in the northwest of France, including Brittany, the western part of Normandy and the Pays de la Loire. It is important because it is connected to Dover on the British side of the English Channel and there has been tilting back and forth that has controlled the geography on both sides.[1]
Its name comes from the old Armorica, a Gaul area between the rivers Loire and Seine. The massif is composed of metamorphic and magmatic rocks that were metamorphosed and/or deformed during the Hercynian or Variscan orogeny (400 to 280 million years ago) and the earlier Cadomian orogeny (650 to 550 million years ago). The region was uplifted when the Bay of Biscay opened during the Cretaceous period. The Cantabrian Mountains and the Armorican Massif were then rift shoulders of the Bay of Biscay.
The competent old rocks of the Armorican Massif have been eroded to a plateaulike peneplain. The highest summit, the Mont des Avaloirs (Mayenne département), is just 417 m (1,368 ft) above sea level. The western part of the Armorican Massif (which covers Brittany) are the Monts d'Arrée.
^King, William Bernard Robinson (1954). "The Geological History of the English Channel". Quarterly Journal of the Geological Society. 110 (1–4): 77–101. doi:10.1144/gsl.jgs.1954.110.01-04.06. S2CID 128402504. Retrieved 15 March 2015.
The ArmoricanMassif (French: Massif armoricain, pronounced [masif aʁmɔʁikɛ̃]) is a geologic massif that covers a large area in the northwest of France...
French breed of cattle Armorican dialect, an extinct dialect of the Gaulish language ArmoricanMassifArmorican terrane Armorican orogeny, a mountain-building...
exposures of the Armorican terrane are found throughout Brittany, the Channel Islands, parts of Upper Normandy, forming the ArmoricanMassif. Other fragments...
the ArmoricanMassif, the Massif Central, the Aquitaine Basin, the Pyrenees, the Alps, the Côte languedocienne, the Sillon rhodanien, the Massif des Vosges...
is generally hilly because it corresponds to the western end of the ArmoricanMassif, a very old range that also extends in Normandy and the Pays de la...
600 BC, using pack horses to link its trade, such as the metals of the ArmoricanMassif, with Phoenicia and Ancient Greece via Lyon on the Rhône. Gallic rule...
bordered by the ArmoricanMassif to the west, the Ardennes-Brabant axis to the north, the Massif des Vosges to the east, and the Massif Central to the...
the Hercynian orogeny; in France similar formations are the ArmoricanMassif, the Massif Central, and the Vosges. The low interior of such former mountains...
Bohemian Massif is often supposed to belong to a terrane called Cadomia or Armorica, which also included the terranes of the ArmoricanMassif in western...
Cotentin Peninsula and Channel Islands. Western Normandy belongs to the ArmoricanMassif, while most of the region lies in the Paris Basin. France's oldest...
which the ArmoricanMassif, the Massif Central, the Morvan, the Vosges and Ardennes ranges and the island of Corsica were formed. These massifs delineate...
The Pissot Formation is a geologic formation in the ArmoricanMassif of Normandy, northwestern France. It preserves fossils dating back to the Darriwilian...
in the region of Normandy. The Cotentin peninsula is part of the ArmoricanMassif (with the exception of the Plain lying in the Paris Basin) and lies...
carved by the river Orne and its tributaries, and by erosion in the ArmoricanMassif between Putanges-Pont-Écrepin and Thury-Harcourt. The river has created...
Europe. It forms part of the geological province of France known as the ArmoricanMassif. There is a broad geological division between the north and south of...
sites in the Armoricanmassif of northwestern France. Vincent Perrier (2012). "An atypical Silurian myodocope ostracod from the ArmoricanMassif, France"...
Cretaceous, drastic changes occurred. Iberia started to rift off the ArmoricanMassif in a southerly direction and in its wake the Bay of Biscay slowly began...
The Massif Central is one of the two large basement massifs in France, the other being the ArmoricanMassif. The Massif Central's geological evolution...
acres (20,200 ha) are heathland and moorland. To the north lies the ArmoricanMassif, a plateau that has been eroded over time, the highest summit of which...
Arequipa-Antofalla – South American geology ArmoricanMassif – Geologic massif that covers a large area in the northwest of France Armorican terrane – Microcontinent or...
the French ArmoricanMassif as an indication that Megalosaurus too did not live on that island and was limited to the London-Brabant Massif. A Megalosaurus...
place afterwards. Secondly P. J. Treloar considers that the North ArmoricanMassif was put together from a series of terranes 540 million years ago, their...
from construction of the Nantes–Brest canal. Nantes is built on the ArmoricanMassif, a range of weathered mountains which may be considered the backbone...
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