To what extent has the Earth's surface been geologically mapped?

Question

To what extent has the Earth's surface been geologically mapped? For instance, what fraction has been surveyed at 1:10 000, 1:100 000 or 1:1 000 000 scale? Edit: By 'surface' I mean land surface, not covered by water. By 'geologically mapped' I mean 'described by a conventional geological map which shows the exposed surface lithologies and their structures'.

Answer 1

Hi Asked,

You might want to check out the onegeology.org "portal" site. There's mapping for all land surface not excessively covered by ice (i.e., not for the interior of Antartica). I leave it to you to check the applicable scales.

-- Cheers, -- Mr. d.