Charles Whitman Cross

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Charles Whitman Cross , called Whitman Cross , (born September 1, 1854 in Amherst , Massachusetts , † April 20, 1949 in Chevy Chase , Maryland ) was an American geologist and petrographer .

Life

Cross attended Amherst College with a bachelor's degree in 1875 and studied from 1877 at the University of Göttingen and the University of Leipzig , where he received his doctorate in 1880 under Ferdinand Zirkel . He then worked for the US Geological Survey until his retirement in 1925 .

He worked for the US Geological Survey, especially in Colorado (mapping in the rugged San Juan Mountains, some with Esper S. Larsen ) and Wyoming (Leucite Hills) and Hawaii (Lava classification, while also Trachyt discovered on the islands) . A (chemical) classification system for igneous rocks is named after him and Joseph P. Iddings , Louis V. Pirsson and Henry Stephens Washington ( CIPW classification after the first letters of the authors' last names).

In 1918 he was President of the Geological Society of America . He was a member of the National Academy of Sciences (1908).

He had been married since 1895 and had a son. In retirement, he dedicated himself to growing roses and also created some commercially marketed rose varieties.

Scientific initial descriptions

The following igneous rocks were first scientifically described by Cross in 1897:

Fonts

  • Igneous Rocks of the Leucite Hills and Pilot Butte, Wyoming, American Journal of Science, 4th ser., 4 (1897), pp. 115-141
  • Lavas of Hawaii and Their Relations, US Geological Survey Professional Paper no.88, Washington, DC, 1915
  • with Larsen: Geology and Petrology of the San Juan Region of South-western Colorado, US Geological Survey Professional Paper no.258, Washington, DC, 1956, online

literature

References and comments

  1. ↑ Before that it was assumed that only basalt was found.
  2. ↑ Cross, Iddings, Pirsson, Washington: Quantitative Classification of Igneous Rocks, Based on Chemical and Mineral Characters, with systematic nomenclature, University of Chicago Press 1903
  3. ↑ Cross, Iddings, Pirsson, Washington, A Quantitative Chemicomineralogical Classification and Nomenclature of Igneous Rocks, Journal of Geology, 10 (1902), 555-690
personal data
SURNAME Cross, Charles Whitman
ALTERNATIVE NAMES Cross, Whitman
BRIEF DESCRIPTION American geologist and petrographer
DATE OF BIRTH September 1, 1854
PLACE OF BIRTH Amherst , Massachusetts
DATE OF DEATH April 20, 1949
Place of death Chevy Chase , Maryland