This is the 7368th most frequent Catalan word.
arqueològica
Relating to archaeology.
Here, 'arqueològica' (archaeological) is an adjective describing the finding or discovery pertaining to archaeology.
La troballa arqueològica va revelar detalls sobre l'antiga civilització.
The archaeological finding revealed details about the ancient civilization.
In this case, 'arqueològica' describes the excavation as being within the field of archaeology, emphasizing the nature and method of the activity.
Durant l'excavació arqueològica, es van descobrir artefactes d'or.
During the archaeological excavation, gold artefacts were discovered.
The word 'arqueològiques' here is used as an adjective modifying 'tècniques', referring to methods and practices employed in the field of archaeology.