Past tense of 'hade': to measure or describe the angle/tilt of a mineral vein or geological fault.
From the verb form of 'hade' (to incline), used in mining and geological contexts with standard '-ed' past tense formation.
In mining reports from the 1800s, geologists would write 'the vein haded at 45 degrees'—a technical verb that was absolutely critical for mapping ore deposits.
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