geologist university professor
Educated in his native town, he graduated Doctor of Philosophy from the University of Bonn in 1861.
His training and initial interest was in mining. In 1860, he traveled to Iceland with William Thierry Preyer, and in 1862 they published Reise nach Island im Sommer 1860. After graduation, Zirkel was engaged in teaching geology and mineralogy in Vienna at the Geological Institution.
His journey to Iceland, along with travels to the Faeroe Islands, Scotland and England, and a meeting with Henry Clifton Sorby, led him from mining to the study of microscopical petrography, then a comparatively new science.
He became professor of geology in 1863 in the University of Lemberg, in 1868 at the University of Kiel, and in 1870 was made professor of mineralogy and geology in the University of Leipzig. He traveled for study in France, Italy, and Scotland.
Came to the United States in 1874 to examine the great collections of minerals made during the exploration of the fortieth degree of latitude. And in 1894-1895 pursued scientific investigations in Ceylon and India.
He retired in 1909. Mount Zirkel in the Park Range of Colorado, United States of America, is named after him.
The mineral zirkelite is named after him. Dorsum Zirkel on the Moon is named after him.
Royal Society; Bavarian Academy of Sciences and Humanities]
He was an honorary Doctor of Science of Oxford University, and also a foreign member of the Royal Society and an honorary member of the Mineralogical Society.