Perth Canyon
A submarine canyon cut into the edge of the continental shelf west of Rottnest Island, off Perth in Western Australia, about as wide and deep as the Grand Canyon. Today it is a quiet 'fossil canyon', with graveyards of deep-sea corals that flourished in it during the last ice age.
Dated events and their evidence
- about 56,000,000 years ago mainstream
the oldest rocks now exposed in the canyon walls are laid down in the Late Paleocene, in a sea 200-700 m deep; OzGeology puts them at around 56 million years source - 31,050 BCE mainstream
deep-sea corals flourish in the canyon during the last ice age, about 33,000 to 18,000 years before present, and leave coral graveyards at 690-720 m and 1,560-1,790 m source - 2015 CE mainstream
1-12 March: the research vessel Falkor carries out the first exploration of the canyon with a remotely operated vehicle source
Where
32.0100° S, 114.9800° E
The point is Wikipedia's position for the canyon, about 22 km west of Rottnest Island; the canyon runs on westward from the shelf edge to depths of about 4,000 m.
Sources
- https://en.wikipedia.org/wiki/Perth_Canyon
- https://doi.org/10.3389/fmars.2019.00173
- https://ozgeology.com/blogs/news/the-hidden-grand-canyon-beneath-perth
Each event carries Aion's own evidence grade (mainstream, disputed or speculative). This page repeats what the globe shows for this place.