At https://phys.org/news/2020-04-fossil-frogs-insights-ancient-antarctica.html … the discovery of the earliest known modern amphibians in Antarctica suggests, once again, a warm and temperate climate prevailed in the Antartic peninsular – prior to separation from Gondwana Land. The frog fossils date from the Eocene period, 40 million years ago. Geologists found evidence that ice formed across the Antarctic peninsular prior to the break up – but in this new study it would seem the fossils contradict that idea (or the ice was temporary). The temperature in the Eocene is being compared to what it is in humid and temperate ecosystems in the forests of South America where modern populations of this frog, and similar, thrive today. They are now going to look for evidence of futher fossils in order to substantiate the theory it was warmer than previously allowed.
See www.nature.com/articles/s41598-020-61973-5
What it means I suppose is a revision of geology as laid out in mainstream theory. As continental drift is apparently out of the question and an expanding earth a non-runner in the game we shall have to wait and see how this is amalgamated into the current model of earth history. Was there a gradual movement of plates or was there a series of jumps and jerks?