Barbara Sherwood Lollar, CC FRSC FRS (born February 19, 1963[1]) is a Canadian geologist and academic known for her research into billion-year-old water.
She has published over 200 peer-reviewed papers in geochemistry, Earth and planetary sciences and supervised over 100 students, postdoctoral fellows and research associates around the world.
[8] She has frequently collaborated with Tullis Onstott and Lisa Pratt on large multi-national research projects.
[10] In 2016, she was invested as a Companion of the Order of Canada "for her revolutionary contributions to geochemistry, notably in the development of innovative mechanisms for groundwater remediation, and for her discovery of ancient fluids that hold implications for life on other planets".
[13] In 2021, she was elected a member of the National Academy of Engineering for contributions to understanding of the evolution of Earth's groundwater and atmosphere.