Where is the oldest layer of sediment? the bottom, top or middle ?

the bottom because layers get added as time goes on so whatevers on the bottom is the oldest

the oldest layer of sediment is at the bottom.

it should be briana that has it to me

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.