Rose Marie Fields, 27, a clerk at the Department of the Interior, died Sunday at the Washington Hospital Center as a result of injuries she received when struck by an automobile two days earlier.

A spokesman for the Arlington police department said Miss Fields had pulled her car to the side of South George Mason Drive in Arlington and was standing next to it. Police said she apparently intended to walk her dog.

A second car went out of control and struck her, police said. Miss Fields was flown to the Washington Hospital Center's Med Star unit and died there. Police said the accident still is under investigation.

Miss Fields was born in Texas and came to this area in 1955. She lived in Washington until 1967 and then she moved to Alexandria. She was a graduate of Hayfield High School in Fairfax County and the Northern Virginia Community College.

She was a laboratory assistant at NOVA's Annandale campus and an instructional aide at its Alexandria campus. She joined Interior's National Environmental Policy division last July.

Miss Fields was a member of the National Speleological Society and its D.C. Grotto. In addition to exploring caves, she was a hiker and camper. She was a volunteer for the March of Dimes.

She was a member of the St. Louis Catholic Church in Groveton.

Survivors include her parents, Mr. and Mrs. Lang William Fields Jr., a foster brother, John Morris, and a brother, Eric, all of Alexandria; another brother, Virgal of Middletown, Ohio; a sister, Mary Lee Fields of Silver Spring, and a grandmother, Lillian Thompson of Washington.