On the lower slopes of the limestone one sees caliche deposit, or that in the vicinity of limestone caliche is formed on the tabular slopes and terms quite close to the limestone out. craps. Later I saw such even on lava slopes. I should think the way the limestone is cracked with solution cracks in all directions, that such in an ancient de- posit might take recognizably as such and find therefore crack such deposits as desert caliches. Probably as they form the tabulars they loose this character. We then are at 4-105 miles farther East on the AFR road near to the western side of the Tucson Mts and in traveling the out to see the Comanchein deposits. The shales appear to be in the main dirty sandstone or sandy shale of a brownish color on the surface. Here occurs an agatized tree about 30"