18 Ore Deposits. 
Gash Vein. 
Fig. 6 illustrates a typical variety of that class 
of ore deposits known as Gash Veins. These are sur- 
imce cracks filled with mineral matter, often taken for 
true fissure veins, from which they differ by their irreg- 
ularity and want of continuity in strike, and dip. They 
thin out in sharp tapering points, divide and disappear 
altogether at inconsiderable depths. A common occur- 
rence in gash veins is what is called a horse (H) ; this, 
together with the absence of selvage or gouge on the walls 
will generally distinguish them from true fissure veins. 
The gash vein class of veins are of common occurrence, 
and are met with in all mining countries. 
