Petrologists

Charles Eugene Barrois (21 August 1851 – 5 November 1939) was a French geologist and palaeontologist.

Antoine François Alfred Lacroix (4 February 1863 – 12 March 1948) was a French mineralogist and geologist. He was born in Mâcon, Saône-et-Loire.

Hatten Schuyler Yoder, Jr., (March 20, 1921 – August 2, 2003) was a geophysicist and experimental petrologist who conducted pioneering work on minerals under high pressure and temperature. He was noted for his study of silicates and igneous rocks.