River Thon
| Thon | |
|---|---|
| Country | France |
| Basin features | |
| Main source | 273 m (896 ft) |
| River mouth | Oise |
| Progression | Oise→ Seine→ English Channel |
| Physical characteristics | |
| Length | 56.3 km (35.0 mi) |
The Thon or Ton is a small river in northern France. It is a tributary of the river Oise, which flows into the Seine. It crosses the Ardennes and Aisne departments and is the central river of the Thiérache.
Coordinates: 49°53′N 3°55′E / 49.883°N 3.917°E
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