Drill depth - significance??

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    What is the significance of drill depth once they hit the bedrock?

    Latest aircore drilling details show variation from BOTR
    (bottom of transported regolith) to TD (total depth) ranging from 1 metres to 30+ metres
    (Average 7.08 at E28 and 9:66 at E39)

    Is 1 metre hitting the malfic rocks (or sulphides) straight away??....
    Or is 1 metre a dud??......
    Why drill to 5,10,20 or 30 metres below BOTR ??....

    Does this define the lower fringes.........

    Significance??...
    Any Geo/Driller comments welcome........

    Thanks - Oilf.
 
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