U W 5 0 7 B H: U W 5 0 7 • A br u pt c h a n g e fr o m li g ht br o w n t o d ar k br o w n i n-sit u m at eri al at ~ 7. 2 m ( D o w n h ol e D e pt h). • Sli p s urf a c e i nt er pr et e d at ~ 5 m d e pt h ( Tr u e D e pt h)
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