A. R. Crook

Alja Robinson Crook (June 17, 1864 – May 31, 1930) was an American scientist and academic from Ohio. Crook attended Ohio Wesleyan University and received a Ph.D. in Europe in 1892. He was a professor of mineralogy and economic geology at Northwestern University from 1893 to 1906, when he was named Illinois State Geologist. As state geologist, he greatly expanded the state museum.

A. R. Crook

Alja Robinson Crook (June 17, 1864 – May 31, 1930) was an American scientist and academic from Ohio. Crook attended Ohio Wesleyan University and received a Ph.D. in Europe in 1892. He was a professor of mineralogy and economic geology at Northwestern University from 1893 to 1906, when he was named Illinois State Geologist. As state geologist, he greatly expanded the state museum.