Dufrenoy p a (2 Ergebnisse)

Original chromolithographed map (overall 59 x 63 cm.) dissected into 18 panels, backed onto linen, folding into original marbled paper covered card slipcase (20 x 11 cm.), F Savy printed paper label to verso of first section. Foxing to verso, map itself lightly toned, generally very good. The key map to the very large original of 1841, here 'Avec les Cercles du Réseau Pentagonal' [With the Circles of the Pentagonal Network], dated 1866. This was the "first attempt at a unifying synthesis of the geometry of tectonic deformations on the scale of the Earth.created by the great master of 19th century French geology, Jean-Baptiste Élie de Beaumont (1798-1874). The reseau was the first attempt to interpret global tectonics, well before the discovery of plates, and despite fundamental errors it left a significant influence on many subsequent theories, notably geosynclines." Comité français d'Histoire de la Géologie, périodique annuel, - Troisième série - T.XXI (2007).…

Paris: Imprimerie Royale, 1841. Fine original colour. Printed area 525 x 550mm, backed on original linen. Original folds. The index map to the first geological map of France, on a scale of 1/2,000,00 rather than the original 1/500,000. The original map was created by Armand Dufrénoy (1792-1857) and Léonce Elie de Beaumont (1798-1874) under the supervision of André Brochant de Villiers (1772-1840). After visiting England to learn the techniques of George Bellas Greenough, who had published a six-sheet geological map of England in 1820, the pair divided France between them and began their research in 1825. Having finished a preliminary survey by 1829, the pair joined together to re-examine some of some areas in greater detail. After finishing their travels in 1836 they spent another five years preparing and engraving their map and writing the accompanying text. The map and first volume of the 'Explication de la carte géologique de la France was published in 1841 with a second volume in 1848; further volumes were published 1873, 1878 & 1879. In recognition of their work, Dufrénoy and Elie de Beaumont were made commanders of the Légion d'honneur, and the Geological Society of London awarded them the Wollaston Medal, their highest award.…