A | upper most entrance to the shaft 18m above the main chamber floor | ||
B | high entrance 12m above the main chamber floor | ||
TS | terminal shaft, reached by descending natural passage (depth shown in metres below foot of scaffolding on main chamber floor) |
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areas under excavation | U | upper cutting | |
L | lower cutting | ||
cave wall at floor level | |||
high entrances | |||
terminal shaft | |||
scaffolding tower, built up in offset stages | |||
stalactites | |||
breccia around uppermost entrance |