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DELESSE, ACHILLE ERNEST OSCAR JOSEPH ...

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Originally appearing in Volume V07, Page 953 of the 1911 Encyclopedia Britannica.
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DELESSE, ACHILLE ERNEST OSCAR See also:JOSEPH (1817-1881) , See also:French geologist and mineralogist, was See also:born at See also:Metz on the 3rd of See also:February 1817. At the See also:age of twenty he entered the Ecole Polytechnique, and subsequently passed through the Ecole See also:des Mines. In 1845 he was appointed to the See also:chair of See also:mineralogy and See also:geology at See also:Besancon; in 1850 to the chair of geology at the See also:Sorbonne in See also:Paris; and in 1864 See also:professor of See also:agriculture at the Ecole des Mines. In 1878 he became inspector-See also:general of mines. In See also:early years as ingenieur des mines he investigated and described various new minerals;, he proceeded afterwards to the study of rocks, devising new methods for their determination, and giving particular descriptions of melaphyre, arkose, See also:porphyry, See also:syenite, &c. The igneous rocks of the See also:Vosges, and those of the See also:Alps, See also:Corsica, &c., and the subject of See also:metamorphism occupied his See also:attention. He also prepared in 1858 See also:geological and hydrological maps of Paris—with reference to the underground See also:water, similar maps of the departments of the See also:Seine and Seine-et-See also:Marne, and an agronomic See also:map of the Seine-et-Marne (188o), in which he showed the relation which exists between the See also:physical and chemical characters of the See also:soil and the geological structure. His See also:annual Revue des progres de geologie, undertaken with the assistance (186o–1865) of Auguste Laugel and afterwards (1865–1878) of See also:Albert de See also:Lapparent, was carried on from 186o to 1880. His observations on the lithology of the deposits accumulated beneath the See also:sea were of See also:special See also:interest and importance. His See also:separate publications were: Recherches sur l'origine des roches (Paris, 1865); Etude sur le metamorphisme des roches (1869); Lithologie des mers de See also:France et des mers principales du globe (a vols. and See also:atlas, 1871). He died at Paris on the 24th of See also:March 1881.

End of Article: DELESSE, ACHILLE ERNEST OSCAR JOSEPH (1817-1881)

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