Answer:
TERMINUS ANTE QUEM
Explanation: Terminus ante quem is an Archeological an a Latin term used to describe the date before which an event or events took place,it is also used to show the date before which Archeological works have been deposited in a given area.
Example, a pottery dating to the 4th century AD found on a surface would give that pottery with a terminus ante quem of the 4thcentury AD.
This type of cross dating can either be TERMINUS ANTE QUEM OR TERMINUS POST QUEM.