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زمینشناسی و معدن::
قطعه ی فرودیواره
Geologists identify the rock surface immediately above the fault surface as the hanging wall block and the rock below the fault as the footwall block (Figure 10.16).
The miners would walk on the rocks below the mineralized fault zone (the footwall block) and hang their lanterns on the rocks above (the hanging wall block).
Normal Faults Dip-slip faults are classified as normal faults when the hanging wall block moves down rela- tive to the footwall block (Figure 10.17).
SmartFigure 10.16 Hanging wall block and footwall block The rock immediately above a fault surface is the hanging wall block, and the one below is the footwall block.
The miners hung their lanterns on the rocks above the fault trace (hanging wall block) and walked on the rocks below the fault trace (footwall block).
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