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1967
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Marcel Gautier, « La tectonique tertiaire dans le massif Armoricain », Annales de géographie, ID : 10.3406/geo.1967.14948
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Résumé
Cenozoic tectonic in the «massif Armoricain » (abstract) : Whereas the actual location of the Miocene beds of the «Massif Armoricain is a matter of discussion, dealing with the tectonic movements which occured after their deposition, some sand and gravel beds, supposed to be Pliocene, namely those of Champéon (Mayenne), bear witness of recent considerable warping. Many large scarps result from tectonic movements in the « Massif Armoricain » and many elevated surfaces seem to have reached their culminating form because of the Cenozoic movements which have raised them. The Cenozoic tectonic movements appear both as wide undulations and breaks. The large fault scarps occur sometimes in the vicinity of worn down land-forms of moderate size wich look like « basins », in a straight line, related to the faults. The tectonic movements have caused a rythmic displacement of the main relief patterns. They occurred during the major part of the Cenozoic period.