Ferdinand Zirkel

Ferdinand Circle ( born May 20, 1838 in Bonn, † June 11, 1912 ) was a German geologist.

Circles in 1861 received his doctorate at the University of Bonn. He was a professor of geology at the University of Lviv ( 1863) and Kiel (1868 ) and from 1870 professor of mineralogy and geology at the University of Leipzig. In 1882 he became a corresponding member of the Bavarian Academy of Sciences.

Circle was a pioneer in the microscopic examination of minerals and rocks.

In 1898 he was awarded the Wollaston Medal of the Geological Society of London.

Works

• Textbook of petrography. (Bonn, 1866; 2 completely new edition wrote Leipzig, 1893-1894 ).
• Elements of mineralogy. [ Founded by Carl Friedrich Naumann; 1877 taken over by Circle ]. Leipzig, Engelmann, 1877, 10th edition
• Geological sketch of the west coast of Scotland. (1871 ).
• The transformation processes in the mineral kingdom: academic speech, delivered on 19 December 1870 in the school hall in Leipzig. Lüderitz, Berlin 1871 ( digitized ).
• The microscopic nature of minerals and rocks. (1873 ).
• The structure of the Vario Lite. (1875 ).
• Limurit from the Vallée de Lesponne. (1879 ).
• About the zircon. (1880 ).