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Mohs, Friedrich (1773-1839), was a German mineralogist who invented the Mohs scale for classifying the relative hardness of materials. The hardness of minerals may be tested by scratching one mineral with another. The harder mineral scratches the softer one. Mineralogists use a scale of hardness based on this principle.
Suess, zyoos, Eduard (1831-1914), an Austrian geologist, became famous for his work on changes of the earth's surface. His most important book was… More>>
Murray, Sir John (1841-1914), was a British naturalist, oceanographer, and deep-sea explorer. He specialized in studying the ocean bottom. He was… More>>
Geikie, GEE kih, Sir Archibald (1835-1924), was a Scottish geologist. He traveled in both Europe and North America, doing field work on glacial and… More>>
Du Toit, Alexander Logie (1878-1948), was a South African geologist. His book The Geology of South Africa (1926) became a standard reference work… More>>
Hutton, James (1726-1797), a Scottish philosopher and chemist, was a pioneer in the field of geology. His main contributions included the ideas… More>>
Merensky, Hans 
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