james hall

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born Sept. 12, 1811, Hingham, Mass., U.S. died Aug. 7, 1898, Bethlehem, N.H. U.S. geologist and paleontologist. He made extensive explorations in the St. Lawrence valley while teaching at Rensselaer Polytechnic Institute (1832-36). In 1836 he was appointed state geologist for the Geological Survey of New York; his studies culminated in the massive Geology of New York (part 4, 1843), a classic in U.S. geology that introduced the geosynclinal theory of mountain building. He was state geologist of Iowa (1855-58) and of Wisconsin (1857-60). He served as director of New York State's Museum of Natural History (1871-98). His major later work was the huge Paleontology of New York (13 vol., 1847-94)

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Sir James Hall
born Jan. 17, 1761, Dunglass, East Lothian, Scot. died June 23, 1832, Edinburgh Scottish geologist and physicist. He founded experimental geology by artificially producing various rock types in the laboratory. He saw that he could obtain different kinds of rocks by melting minerals and cooling them at a controlled rate. Later he produced a rock that closely resembled natural marble by heating calcium carbonate under pressure. He experimented extensively with igneous rocks from Scotland and showed that they had been produced by intense heat
james hall

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    James hall

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