Below are some alternatives to what the land masses and equator may have resembled in the past. Thanks to the creator of these images JR Bentley. Great work!
[click on images for larger pic]
Image #1: In this image Antarctica is closer to the equator and would be in a Tropical or sub-tropical zone which would explain the prehistoric forest of palm trees found there. Notice too how close New Zealand and Australia would have been to the equator.
Image #2: In this image the equator runs through North America. That would have made the Great Lakes area a tropical area as well as portions of the American Southwest, et al. The North Pole would have been somewhere over eastern Siberia and the South Pole near Brazil’s Amazon.
Image #3: In this image the equator runs through North Africa and Spain among other places.
You can find a list of super-continents at: https://en.wikipedia.org/wiki/List_of_supercontinents
Among some of the more interesting to me are as follows:
Pangea or Pangaea past to present
Gondwana 550 mya
Rodinia (1.3 bya to about 600 mya) is the first CONFIRMED supercontinent:
Columbia Supercontinent 1.8 mya
Another possible scenario of where the land masses and equator may have been 55 mya created by C. Coburg. In this arrangement the palm forest in Wilkes Land, Antarctica is where we find it. It also shows the central US in the tropic zone which is where researchers say it was 55 mya and the equator is running near Svalbard, Norway (islands) where we find the remains of yet another prehistoric palm forest dating at 55 mya. This is, of course, assuming there were palm forests in Antarctica and Arctic Norway at this time. Also, in the middle pic it shows East Africa on the Equator where ancient human ancestors first evolved according to the Out of Africa Theory.