Crossite is named after Charles Whitman Cross, an American USGS petrologist. The New York Times called him "a distinguished petrologist". It was named after Joseph P. Iddings, an American petrologist. Rapakivi was first described by Finnish petrologist Jakob Sederholm in 1891. Maria Luisa (Weecha) Crawford is an American geologist/petrologist. It was named after Russian petrologist, N.G. Sudovikov who lived from 1903 to 1966. In her sophomore year, she began working for and researching with petrologist Gordon Moore. The name was introduced in 1973 by German mineralogist and petrologist Werner Schreyer. The mineral was named for USGS petrologist Edward C. T. Chao (1919-2008). He was primarily a petrologist and mineralogist, though later in his career contributed to geochronology. Lorence Gene "Larry" Collins, born November 19, 1931, in Vernon, Kansas is an American petrologist.