A Boston alumnus has donated at least one million dollars to the University to establish a unique archaeology professorship, the director of the Peabody Museum of Archaeology and Ethnology said yesterday.

The chair will be the first ever in a social science department to deal specifically with the dating and identifying of archaeological materials, the director, C.C. Lamberg-Karlovsky, said.

Landon T. Clay '50, chairman of the board of the Eaton, Vance Corporation and a benefactor of the department for two decades, gave the donation as part of the ongoing Harvard Campaign effort to raise $60,000,000 for endowed professorships.

Clay was the natural person to approach for the professorship, Lamberg-Karlovsky said, adding that the philanthropist had already funded a junior professorship in the department.

Lamberg-Karlovsky explained that natural scientists have studied dating techniques for 10 to 15 years, but social scientists have just begun to explore the field.

He added that the professorship will almost certainly be filled by an outsider since no Harvard faculty members are currently involved in the area. A search is now underway, and the post should be filled by 1985.