She was promoted to a Lecturer in 1940 and then Senior Lecturer in 1945. In 1950, on her marriage to fellow geologist and colleague William Rowan Browne, she resigned from the university and worked from home with her husband, undertaking fieldwork with him when required up until 1965. She published ten papers after her marriage. Ida’s research included Silurian and Devonian fossiliferous sequences in the Yass district, Palaeozoic invertebrates with a focus on brachiopods including Permian spiriferids of south-eastern Australia, stratigraphic studies and geological mapping.
In 1945, Ida became the first female President of the Linnean Society of which she had been a member since the 1920s, and in 1953 became the first female President of the Royal Society of New South Wales. She was a foundation member of the GSA and she served as a Member of the Australian National Research Council. She mentored many students including Joan Crockford (1919-2015).
Branagan, David (1977). "Ida Alison Browne". Journal and Proceedings of the Royal Society of New South Wales. 110: 75–76. https://www.biodiversitylibrary.org/item/186617#page/88/mode/1up, accessed online 4 November 2019.
Hooker, Claire (2001). "Stratigraphy: Dr Ida Alison Browne, 1900-1976". Australasian Science. 22 (5). https://ses.library.usyd.edu.au/bitstream/handle/2123/10608/Dr%20Ida%20Alison%20Browne%202001.pdf?sequence=1, accessed online 4 November.
Turner, S., 'Invincible but mostly Invisible: Australian Women's Contribution to Geology and Palaeontology', Geological Society Special Publication, vol. 281, 2007, pp. 165-202.
Vallance, T.G. 'Browne, Ida Alison (1900–1976)', Australian Dictionary of Biography, National Centre of Biography, Australian National University, http://adb.anu.edu.au/biography/browne-ida-alison-10004/text16935, published first in hardcopy 1993, accessed online 4 November 2019.
Walker, R., 'Brown, Ida Alison (1900 - 1976)', in Encyclopedia of Australian Science, http://www.eoas.info/biogs/P002277b.htm, accessed online 4 November 2019.
Walker, R., 'Browne, Ida Alison (1900 - 1976)', in Bright Sparcs, 2009, http://www.asap.unimelb.edu.au/bsparcs/biogs/P002277b.htm
Ian Withnall and Sue Turner