from
The Collaborative International Dictionary of English v.0.48
Stockwork \Stock"work`\, n. [G. stockwerk.]
1. (Mining) A system of working in ore, etc., when it lies
not in strata or veins, but in solid masses, so as to be
worked in chambers or stories.
[1913 Webster]
2. (Geol.) A metalliferous deposit characterized by the
impregnation of the mass of rock with many small veins or
nests irregularly grouped. This kind of deposit is
especially common with tin ore. Such deposits are worked
in floors or stories.
[1913 Webster]