This is the 13192nd most frequent German word.
archäologischen
"Archäologischen" means "archaeological" in English.
Here, 'archäologischen' is used as an adjective modifiying 'Funde', giving context about the type of finds discussed, attributing them to archaeology.
Die archäologischen Funde offenbaren viel über das Leben der alten Zivilisationen.
The archaeological finds reveal a lot about the life of ancient civilizations.
In this sentence, 'archäologischen' is an adjective modifying 'Grabung', describing the excavation as pertaining to archaeology.
Während der archäologischen Grabung wurden spannende Artefakte entdeckt.
During the archaeological excavation, exciting artifacts were discovered.
Here, 'archäologischen' modifies 'Untersuchung', specifying the nature of the investigation as related to archaeology.