Fossil footprints found in Sydney suburb are
from the earliest swimming tetrapods in Australia
by Phil Bell, University of New England
https://phys.org/news/2020-05-fossil-footprints-sydney-suburb-earliest.html
Roy M. Farman et al. Australia's earliest tetrapod
swimming traces from the Hawkesbury Sandstone
(Middle Triassic) of the Sydney Basin, Journal of
Paleontology (2020). DOI: 10.1017/jpa.2020.22
https://www.cambridge.org/core/journals/journal-of-paleontology/article/australias-earliest-tetrapod-swimming-traces-from-the-hawkesbury-sandstone-middle-triassic-of-the-sydney-basin/2C787D68A8F2F300B2111A0E68E5981C
Yours,
Paul H.