As It Is
Unless we have the means to explore & model the whole world ourselves - we have to accept that there are some things we cannot be absolutely sure of.
“I would rather have questions that can't be answered than answers that can't be questioned.” - Richard Feynman
Below is an image of Gleasons' New Standard Map Of The World followed by a video animation (model) based on a current understanding of the Earth System, to the best of our knowledge.
A good place to start I reckon, though it's important for us to continue with our observations.
In the immortal words of The Carpenters;
"We've only just begun..."
Cheers & God bless!!