Mayenne
Mayenne ( ) is a landlocked department in northwest France named after the river Mayenne. Mayenne is part of the administrative region of Pays de la Loire and is surrounded by the departments of Manche, Orne, Sarthe, Maine-et-Loire, and Il ...
and
Maine-et-Loire
Maine-et-Loire () is a department in the Loire Valley in the Pays de la Loire region in Western France. It is named after the two rivers, Maine and the Loire. It borders Mayenne and Sarthe to the north, Loire-Atlantique to the west, Indr ...
'' départements'', western France. Its source is near La Gravelle. It flows generally south east. It is a
right tributary
A tributary, or an ''affluent'', is a stream or river that flows into a larger stream ('' main stem'' or ''"parent"''), river, or a lake. A tributary does not flow directly into a sea or ocean. Tributaries, and the main stem river into which the ...
of the
Mayenne
Mayenne ( ) is a landlocked department in northwest France named after the river Mayenne. Mayenne is part of the administrative region of Pays de la Loire and is surrounded by the departments of Manche, Orne, Sarthe, Maine-et-Loire, and Il ...
Verzée
The Verzée () is a river in the Loire-Atlantique and Maine-et-Loire '' départements'', western France. Its source is at Soudan. It flows generally east-southeast. It is a right tributary
A tributary, or an ''affluent'', is a stream or riv ...
Cossé-le-Vivien
Cossé-le-Vivien () is a commune in the Mayenne department in north-western France.
Geography
The river Oudon flows through the middle of the commune and forms most of its north-western border. It contains museum dedicated to Robert Tatins w ...
Nyoiseau
Nyoiseau () is a former commune in the Maine-et-Loire department in western France. On 15 December 2016, it was merged into the new commune Segré-en-Anjou Bleu.Sainte-Gemmes-d'Andigné
Sainte-Gemmes-d'Andigné (, literally ''Sainte-Gemmes- of Andigné'') is a former commune in the Maine-et-Loire department in western France. On 15 December 2016, it was merged into the new commune Segré-en-Anjou Bleu.Segré
Segré () is a former commune in the Maine-et-Loire department in western France. On 15 December 2016, it was merged into the new commune Segré-en-Anjou Bleu.La Chapelle-sur-Oudon, Andigné,
The Oudon was canalised in the 19th century from Segré to the river Mayenne, over a distance of 18 km with three locks. The waterway was used to transport timber for construction,
granite
Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly coo ...
and
slate
Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism. It is the finest-grained foliated metamorphic ro ...
. The river, restored to navigation in 1980, is now part of the popular Anjou river network, with the Mayenne, Sarthe and their "common trunk" of the Maine down to the river Loire.