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Image source: Scrope, George Poulett (1797-1876). Memoir on the geology of central France; including the volcanic formations of Auvergne, the Velay, and the Vivarais. London: Printed for Longman, Rees, Orme, Brown, and Green, 1827

Vulcan's Forge and Fingal's Cave

Volcanoes, Basalt, and the Discovery of Geological Time

The World-Wide Distribution of Volcanoes, 1802

Ordinaire, Nicolas (1736-1808). Histoire naturelle des volcans: comprenant les volcans soumarins, ceux de boue, et autres phénomènes analogues. Paris: Chez Levrault frères, 1802.

Pacific Ocean map. Image source: Ordinaire, Nicolas. Histoire naturelle des volcans: comprenant les volcans soumarins, ceux de boue, et autres phénomènes analogues. Paris: Chez Levrault frères, 1802, pl. 1.

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The world-wide extent of volcanism was brought graphically to life in this map published in 1802. It purports to show all the active volcanoes in the world, and it is astonishing how many were known by this time, when you consider that fifty years earlier, the map could have been confined to Europe. Numerous volcanoes are shown in Kamchatka, in Japan, in Java and Sumatra and other islands of Malaysia. The volcanoes of Ecuador and Peru are shown in abundance, as are those of Mexico, which were explored by Humboldt. Many of the volcanic islands of the Atlantic and Pacific are represented, such as Tenerife in the Canaries and the isle of Bourbon (now Reunion) off Madagascar.

The illustration above shows the portion of the map that depicts the Pacific ocean. A further detail below shows the Kamchatka peninsula, which was visited and mapped by Lesseps in 1789 (see exhibit item 39).

Detail of Kamchatka peninsula. Image source: Ordinaire, Nicolas. Histoire naturelle des volcans: comprenant les volcans soumarins, ceux de boue, et autres phénomènes analogues. Paris: Chez Levrault frères, 1802, pl. 1.

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