Locations of the ancient magnetic North and South Poles on each small Earth model were established using the published palaeomagnetic pole data of:

McELHINNY M. W. & LOCK J. 1996. IAGA paleomagnetic databases with Access. Surveys in Geophysics, 17, 575-591.

The locations of each of the present-day and ancient circles of latitude and climate zones are based on these established magnetic pole locations and are shown plotted as yellow dashed lines and circles on each of the Expansion Tectonic small Earth models. In reality, this representation may not be strictly correct as the location of the circles and zones is dependent on the tilt of the Earth's axis. If the tilt of the ancient Earth axis varied significantly from what it presently is, then the width and location of the zones would be affected. Because of the limited amount of available data and research effort, at this stage, absolute confirmation of the Earth's ancient tilt is still very difficult to determine.

The intent of showing these largely hypothetical climate zones on each of the Climate Zone globes is simply to give an indication of the anticipated geographic location of the ancient supercontinents and seas, plus an indication of what the ancient climate may have been.

As well as plotting climate zones, the distribution of glacigenic rocks over time are also plotted as red dots. For example: . These data are based on the publication of:

HAMBRY M. J. & HARLAND W. B. eds. 1981. International Geological Correlation Programme Project 38: Pre-Pleistocene Tillites. Earth's Pre-Pleistocene glacial record. Cambridge: Cambridge University Press, London.

As noted elsewhere, the continental development of both East and West Antarctica is speculative because of the masking effect of the present-day ice-sheet coverage. This ice cover, as well as the ice-sheet covering Greenland, is part of the Geological Map of the World base map used to construct the small Earth models and could not be removed during model construction.