La Voulte-sur-Rhône (French pronunciation: [la vult syʁ ʁon], literally La Voulte on Rhône; Occitan: La Vòuta) is a commune in the Ardèche department in southern France.

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La Voulte-sur-Rhône
Commune
La Voulte-sur-Rhône seen from across the river
Coat of arms
Location of La Voulte-sur-Rhône
La Voulte-sur-Rhône Show map of France La Voulte-sur-Rhône Show map of Auvergne-Rhône-Alpes
Coordinates: 44°48′01″N 4°46′48″E
Country	France
Region	Auvergne-Rhône-Alpes
Department	Ardèche
Arrondissement	Privas
Canton	Rhône-Eyrieux
Intercommunality	CA Privas Centre Ardèche
Government
• Mayor (2020–2026)	Bernard Brottes[1]
Area 1	9.70 km2 (3.75 sq mi)
Population  (2021)[2]	4,791
• Density	490/km2 (1,300/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	07349 /07800
Elevation	85–405 m (279–1,329 ft) (avg. 98 m or 322 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

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La Voulte-sur-Rhône is a marine Lagerstätte (sedimentary deposit) located in France. It is Middle Jurassic (Callovian) in age, and is known for the variety of fossils it produces, including cephalopods, such as Proteroctopus ribeti, Rhomboteuthis lehmani, and Vampyronassa rhodanica. Fossilized cephalopods are rare, and Voulte-sur-Rhône is prized among paleontologists as one of only a few known localities known to produce such cephalopod fossils. Fossil preservation is by pyrite, a geologically rare process. Other sites with pyrite preserved fossils are Beecher's Trilobite Bed and the Hunsrück Slate.^[5] Also found at the site are ophiuroids, crustaceans, fish, and other pyritized specimens.^[6] The exceptional preservation of the fossils at this site is most likely due to the result of oxygen deficient water at the time of the deposition of the fossils, and possibly repeated sediment blanketing.^[7]

• Communes of the Ardèche department