excavation

definition: the act of extracting ores or coal etc from the earth
example:
speech part: noun
synonyms: mining
definition: the act of digging
example: there's an interesting excavation going on near Princeton
speech part: noun
synonyms: dig
definition: a hole in the ground made by excavating
example:
speech part: noun
synonyms:
definition: the site of an archeological exploration
example:
speech part: noun
synonyms: archeological site dig

How excavation is being used?