Henri Coquand

Henri Coquand (1813, in Aix-en-Provence – 1881, in Marseille) was a French geologist and paleontologist.

In 1841 he obtained his doctorate in sciences in Paris, and later served as professor of geology at the Universities of Besançon, Poitiers and Marseille.[1]

From his geological studies of southwestern France, he introduced the Upper Cretaceous stages: Coniacian, Santonian and Campanian (1857).[2] In 1871 he proposed the Berriasian stage of the Lower Cretaceous, named after Berrias, a town in the department of Ardèche.[3] He also conducted geological / paleontological research in Spain, Algeria and Morocco.[1]

In 1838 he founded the Muséum d'Aix in Aix-en-Provence.[4] From 1862 to 1870 he was a correspondent member of the Comité des travaux historiques et scientifiques, and from 1871 to 1881, he was a munincipal councillor in Marseille.[1]

The mineral "coquandite" commemorates his name; chemical formula= Sb6O8(SO4)•(H2O).[5]

Selected works
  • Traité des roches considérées au point de vue de leur origine et de leur composition, 1856 – Treatises on rocks considered from the point of view of their origins and compositions.
  • Description physique, géologique, paléontologique et minéralogique du département de la Charente, 1856 – Physical, geological, paleontological and mineralogical descriptions of the department of Charente.
  • Géologie et paléontologie de la région sud de la province de Constantine, 1862 – Geology and paleontology of the region south of Constantine Province.
  • Description géologique de la Province de Constantine, 1864 – Geological description of Constantine Province.
  • Monographie de l'étage aptien de l'Espagne, 1865 – Monograph on the Aptian stage of Spain.
  • Monographie du genre Ostrea. Terrain Crétacé, 1869 – Monograph on the genus Ostrea, Cretaceous terrain.[6]
gollark: You can use advanced "multiplication" technology to compute "expected value".
gollark: Ah, but it has a probability of still existing.
gollark: What do you mean "a priori"? Just come up with some ridiculous """pure logical proof""" that the afterlife exists regardless of observations of it?
gollark: If there's no way to detect something, it doesn't meaningfully exist.
gollark: And yes, because you can enjoy things while not dead.

References
  1. Prosopo Sociétés savantes
  2. Upper Cretaceous Stratigraphy of the Western Gulf Coast Area of México by Emile A. Pessagno
  3. A Geologic Time Scale 1989 by Walter Brian Harland
  4. See Provence Natural History Museum of Aix-en-Provence
  5. Webmineral.com Coquandite Mineral Data
  6. OCLC Classify published works.
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