The photo above is a good example of the geology I am trying to present in this thread. In my first thread, "Dikes along Turkey Creek", I touched upon the heating and cooling processes that occur during the uplift/intrusion process. Keeping in mind the cooling process that create ore deposits, you can see in the photo that the tunnel is well below the exposed dikes above, the exposed dikes having cooled more quickly eliminating the formation of precious metals and crystals. Also, notice the red soil at the tunnel entrance.
Above is a close up of another tunnel
A wider view of the above tunnel
Here is yet a wider view of the tunnel. About a third of the way up in the photo and slightly left of center is the tunnel entrance. Notice the dikes that are up high and then the lower dikes. Those lower dikes are much more mineralized, due to the slower cooling process. The lower dikes were exposed by the cutting action of the creek (Turkey Creek).
This photo is a wider view, taking in the river, shot from the upper dike that is seen in the previous photos. The tunnel entrance is just off camera in the lower right corner. This photo demonstrates the cutting action of the creek. Over time, cutting down nearly 3 hundred feet, exposing the ore body where this tunnel is located. (can you imagine being the first person to stumble across this?)
inside the tunnel - as far as I dared go - notice the "drifts", one to the left and one to the right.
the photo above is of the side wall in the tunnel - very hot indeed!
A bar (36 in) and a chisel (8 inch) found while raking thru the tailings. Also, notice how mineralized these tailings are. I found no gold in those tailings but many quartz crystals.
So, the moral of this story is, when you are standing next to an Iron Stone Dike, look below, much further below.