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A pick and hammer crossed at the head.
Also known as: Saikochi mark, Colliery mark
Denotes a mine or underground extraction site on a Japanese topographic map.
Marks a mine or underground extraction site on a GSI topographic sheet.
Contexts: Maps
Differs from the quarry symbol by one tool, distinguishing underground working from surface working by the implement each requires.
Contexts: Maps
A pick and a hammer crossing near their heads, the two tools distinguishable by the shape of each head.
The quarry mark is two picks crossed. This one is a pick crossed with a hammer.