I don't think the sentence is ambiguous, although it does show a partial understanding of where Tectonic Plates - Wikipedia, the free encyclopedia are, and what they do there.
'Topography', here, refers to a sort of landscape - having certain features; 'quilt' is a rather confusing metaphor. I think it is referring to a Patchwork quilt - Wikipedia, the free encyclopedia, rather than to a duvet . In pushing up (forming) mountains, the tectonic plates mix up the geological strata so that there is a 'patchwork' of different sorts of rock on the surface.
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