Armançon
| Armançon | |
|---|---|
The Armançon in Nuits
|
|
| Country | France |
| Basin features | |
| Main source |
Bourgogne 380 m (1,250 ft) |
| River mouth |
Yonne 47°57′8″N 3°30′30″E / 47.95222°N 3.50833°ECoordinates: 47°57′8″N 3°30′30″E / 47.95222°N 3.50833°E |
| Progression | Yonne→ Seine→ English Channel |
| Basin size | 2,990 km2 (1,150 sq mi) |
| Physical characteristics | |
| Length | 202 km (126 mi) |
| Discharge |
|
The River Armançon drains part of north-western Burgundy in France. It rises in the département of Côte-d'Or and flows into the River Yonne (right bank) at Migennes. Its origin is at an elevation of about 380 metres (1,250 ft) above sea level and enters the River Yonne, 202 kilometres (126 mi) downstream, at 79 metres (259 ft).
It rises 2 kilometres (1.2 mi) north-west of Meilly-sur-Rouvres in the district known as the Auxois, on the lip of the saucer represented by the Paris Basin. It flows down the western, dip slope of the Côte d'Or and on the margin of the Morvan. Its source is on the Lower Jurassic rocks where they and the Upper Triassic are much influenced by the granites and volcanism of the Morvan, a northward extension of the Massif Central.
The river's upper valley is used by the Canal de Bourgogne and the Autoroute A6 but the two diverge and the river passes between them, alone towards the small town of Semur-en-Auxois. In this part of its course the river has cut its valley down through the Jurassic rocks to the underlying granite. The Cernant joins just below Semur.
Near Buffon, north-west of Montbard, the canal joins it again from the Brenne valley accompanied by the Dijon to Paris (Gare de l'Est) railway. The Bornant enters from the left slightly lower. They all pass through forested country on Middle Jurassic geology. Shortly after, they pass into the département of Yonne. Near the border between the départements and just below Ravières, the river passes onto the Upper Jurassic where the valley bottom has accumulated Holocene alluvium. However, the Upper Jurassic rocks are available to supply the clay element of the materials for the cement works which lie between the river and the canal between Pacy-sur-Armançon and Lézinnes. Still in forested country, it passes the small town of Tonnerre and passes very briefly through the département of Aube as it flows onto the lower Cretaceous rocks, clothed in less woodland.
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Wikipedia