La Voulte-sur-Rhône

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Commune in Auvergne-Rhône-Alpes, France

Coat of arms

Location of La Voulte-sur-Rhône

(2020–2026) Bernard Brottes^[1]Area

9.70 km² (3.75 sq mi)Population

(2021)^[2]

4,791 • Density490/km² (1,300/sq mi)Time zoneUTC+01:00 (CET) • Summer (DST)UTC+02:00 (CEST)INSEE/Postal code

07349 /07800

Elevation85–405 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.

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.

Population

Historical population

Year	Pop.	±% p.a.
1793	1,168	—
1800	1,369	+2.29%
1806	1,261	−1.36%
1821	1,419	+0.79%
1831	1,920	+3.07%
1836	2,189	+2.66%
1841	2,459	+2.35%
1846	3,155	+5.11%
1851	3,153	−0.01%
1856	3,045	−0.69%
1861	3,285	+1.53%
1866	3,160	−0.77%
1872	3,534	+1.88%
1876	4,615	+6.90%
1881	4,958	+1.44%
1886	4,219	−3.18%
1891	3,148	−5.69%
1896	2,604	−3.72%

Year	Pop.	±% p.a.
1901	2,738	+1.01%
1906	2,651	−0.64%
1911	2,760	+0.81%
1921	3,043	+0.98%
1926	4,032	+5.79%
1931	4,326	+1.42%
1936	3,113	−6.37%
1946	4,047	+2.66%
1954	4,489	+1.30%
1962	5,537	+2.66%
1968	5,978	+1.29%
1975	5,892	−0.21%
1982	5,297	−1.51%
1990	5,116	−0.43%
1999	5,168	+0.11%
2007	4,993	−0.43%
2012	5,115	+0.48%
2017	4,987	−0.51%

Source: EHESS^[3] and INSEE (1968-2017)^[4]

Lagerstätte

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]

References

^ "Répertoire national des élus: les maires". data.gouv.fr, Plateforme ouverte des données publiques françaises (in French). 2 December 2020.
^ "Populations légales 2021". The National Institute of Statistics and Economic Studies. 28 December 2023.
^ Des villages de Cassini aux communes d'aujourd'hui: Commune data sheet La Voulte-sur-Rhône, EHESS (in French).
^ Population en historique depuis 1968, INSEE
^ Paul A. Selden; John R. Nudds (2005), Evolution of Fossil Ecosystems (PDF), University of Chicago Press, IL, p. 192, ISBN 978-0-226-74641-8, archived from the original (PDF) on 14 July 2011 see page 41
^ (Bartels, Briggs, and Brassel 1998)
^ (sensu Seilacher, Reif, and Westphal 1985)