We must remember that this area was involved in repeated episodes of Glaciation. As much as several kilometers of surface rock would have been ground away from the Earth's Crust in these episodes, filling in the Ohio-Illinois basin area. What we are getting under the ~1-20m of overburdes left behind after one of those Glaciation Events is considered to be Bed Rock. And it is apparent that much of our Eagle1 Deposit has been removed at surface.

What we have for a deposit is the result of Geologic events that occured at depth way back when. Magma as opposed to Lava.

Old Joe