- n. The hole drilled to retrieve a core sample.
- core + hole (Wiktionary)
“The reserves report incorporates all of the drilling and technical data recovered from STP's McKay lands up to and including the most recent corehole drilling program completed in March 2010.”
“Although no physical exploration work has been completed on the MacKenzie block to date, Rochester has surveyed for a corehole program on the block.”
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