Roy S. Clarke is an American scientist focusing on geochemistry.
Clark got his education in Cornell University, where he got his bachelor's degree in 1949.
In 1957 he got his master's degree in geochemistry at George Washington University.
[1] Starting from 1966, he was an associate curator in the department of mineral sciences, a division of National Museum of Natural History, and in 1970, got a position as curator at the same place.
[2] He still works as research chemist emeritus in the division of meteorites at the museum.