What is the significance of faults for rockhounding? Options

[yakyakgoose]

Im not sure if this is the right place to ask this but I didnt see a general geology section....or new person's stupid questions section either :)

So Ive been learning about geological maps among many other things on my own and I noticed that there seems to be some significance given to faults in general geology and rockhounding. Could someone tell me why? What does a fault signify to a rockhounder? Why do geologists document every little one of them?

[johnnybravo300]

It might also refer to the "faulting and folding" as some usgs geo reports say. In that case it's where the layers are folded in whichever direction and faults will occur as the layers weaken at the folds, which also may allow gases from below to escape which usually causes mineralization and the surrounding rocks to change. There are gases and magma under great pressures and they always find the weak "faults in folded layers".
If your finding minerals there is a fault.