Outrageously Funny Word Dictionary :: Subdrill

👉 In geology and related disciplines, a subdrill is a small hole drilled below the surface of a rock formation. This type of drillhole serves primarily for exploration purposes but can also be used to conduct underground surveys or to test new geological formations. Subdrills are typically smaller than main-drilling holes, often no more than 50 feet (15 meters) deep. They are designed to provide a relatively shallow view of the rock layer beneath, allowing for detailed observations and measurements during

subdrill