Jean Baptiste Julien d'Omalius d'Halloy
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Jean Baptiste Julien d'Omalius d'Halloy was a Belgian statesman and geologist. He was the first to define the Cretaceous as a distinct geological period, in 1822. He produced the first geological map of France, the Benelux, the Rhineland and Switzerland, completed in 1813 and published in 1822.
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Jean d'Omalius d'Halloy
Carte géologique du bassin de Paris et de quelques contrées voisines » par d’Omalius d’Halloy (1816)
Essai d'une Carte Géologique de la France, des Pays-Bas et de quelques contrées voisines par Jean-Baptiste Julien d'Omalius d'Halloy (1783-1875)
Château d'Halloy, home of J-B Julien d'Omalius d'HalloyAwards 1
Politicians born in the 1780s 6
About this person
Jean Baptiste Julien d'Omalius d'Halloy was a Belgian statesman and geologist. He was the first to define the Cretaceous as a distinct geological period, in 1822. He produced the first geological map of France, the Benelux, the Rhineland and Switzerland, completed in 1813 and published in 1822. Halloysite, a clay mineral, was named in his honour. He also wrote on races.
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