Superposition

n.

1.

The act of superposing, or the state of being superposed; as, the superposition of rocks; the superposition of one plane figure on another, in geometry.

Noun	1.	superposition - (geology) the deposition of one geological stratum on another
	2.	superposition - (geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest Synonyms: principle of superposition, superposition principle
	3.	superposition - (geometry) the placement of one object ideally in the position of another one in order to show that the two coincide
	4.	superposition - the placement of one thing on top of another

deposit, deposition, geology