Synonyms for Superimposed (same or very similar meaning)
WordNet sense 1 (placed on or over something else):
overlyingWordNet sense 2 (lying immediately above or on something else):
superjacentWordNet sense 3 (with one layer on top of another):
layeredWordNet sense 4 (deposited or arranged in horizontal layers):
stratified, beddedFrom the ODE community, based on WordNetadd/edit