Show idaho sinking mountains we are told that we are separated from the molten fluid which fills the in t gerior elsor ot of the earth hy by a crust of earthy matter which Is only 18 miles thick and lei in tome some places the crust is actually believed to be much thinner in idaho idah ch tor for an instance it would not take m ch argument to make some of the geologists believe that it is less than isace ft to the molten interior ol of the globe the reason that the earths shell Is litell believed eved to be very athin thin in the region named is the known tact fact that some of the greatest mountains in that state are actually settling down through it according to recent measurements it has been ascertained that at least four different peaks in the state mentioned are from 14 to lower than they were in mo 1880 it is believed that these mountains have been gradually sinking into the earth for y years ears but no cause has yet been assigned sa s1 for jor the phenomena |