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Geography --- Navigation --- History. --- 912 <7/8> --- Maritime history --- History --- Cartografie. Kaarten. Plattegronden. Atlassen--?<7/8> --- America --- Discovery and exploration.

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The explorer and multi-disciplinary scientist Alexander von Humboldt (1769-1859) was a prominent figure in the European scientific community of the eighteenth and nineteenth centuries and the first to make a scientific survey of South and Central America. His travels alone brought him widespread recognition, but the extensive field notes and research he undertook were developed further on his return. Originally published in French and translated in 1823, this work brought his geological speculations to a British audience. Humboldt explores the positioning of different types of rocks across the globe, and the causes behind these formations. He also hypothesises that the flora of these areas are affected by the geology, which in turn is influenced by the thermal currents of the earth's molten core. These insights into rock formations are also key to Humboldt's theory of continental drift, now recognised as resulting from the shifting of the continental plates.

Petrology --- Geology --- Science

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Humboldt (alexander, baron von), naturaliste et voyageur allemand, 1769-1859 --- Anniversaires, etc.

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Prussian explorer and naturalist Alexander von Humboldt (1769-1859) was described by Darwin as 'the greatest scientific traveller who ever lived'. His boundless curiosity as well as his scientific and cultural knowledge helped lay the foundations of physical geography, climatology, ecology and oceanography. In 1799, Humboldt embarked on a five-year trip to explore Central and South America. He devoted a large amount of time to the study of géognosie, the science of the origin and distribution of minerals and rocks forming the earth, later known as geology. In 1805, Humboldt published his first impressions of volcanoes and earthquakes in the Americas in his Personal Narrative. In this 1826 work, he makes the first systematic attempt to compare the rocks of the Old and New Worlds. This groundbreaking analysis became one of the most important geological works of its time.