Helen Reynolds Belyea, OC FRSC (February 11, 1913 – May 20, 1986), was a Canadian geologist best known for her research in Western Canada on the Devonian System, a geologic period of the Paleozoic era.

Societal norms of the 19th century confined women to the role of housewives, however Belyea's notable contributions and efforts enabled her to work in the field alongside men as equals.

[5] It is important to note that as women got accepted into jobs in the field of geology, they faced significant challenges in securing respectable positions.

[6] Helen Belyea established herself as an authority figure within her field of study, specifically her research and analysis of the Devonian geologic system in Western Canada.

[1] She went on to earn a Ph.D. from Northwestern University in Evanston, Illinois, her doctoral thesis was titled "The Geology of Musquach Area, New Brunswick."

After receiving her doctorate in geology, Belyea worked as a teacher in private high schools, both in Victoria and Toronto.

Her first paper, on facies relations and reef-off-reef sequences in the upper Devonian, was published in Geological Survey of Canada in 1952.

[7] She is best known for her contribution on the volume ‘The Atlas’ in the Geological History of Western Canada, where she wrote maps and text for the whole Devonian region.

Other written works of Helen Belyea include her book "The Story of the Banff National Park" which was published in 1960.

In 1966, Helen Belyea became the co-chairman of the First International Symposium on the Devonian System, which the Alberta Society of Petroleum Geologists sponsored.