churn hole

churn hole

[′chərn ‚hōl]
(civil engineering)
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References in periodicals archive ?
Pits and a shallow, now-caved shaft were excavated by early prospectors, and one possible shallow churn hole may have been drilled by Anaconda on the property prior to 1962.
Those resources are based on 7,249 drill holes, primarily churn holes drilled through gold-bearing sands and gravel into underlying bedrock, covering the 15,000-acre Nome Gold property owned by NovaGold.