also the introduction of fresh waters. The conglomerate is of the same age as the Order- cene beds since one sees in it identical rocks. This is also the opinion of Prof. Lawson. This opinion receives further confirmation in the fact that in both cases one finds Carboniferous Permian rocks. July 24 Monday, Camp III. Left Camp 7:15 A.M. and started for Button Creek Coal Mines where we arrived at 11 A.M. The lignite is exposed in a narrow dry run in the prairie. The Creek flows along the bed of the coal. Dip North. 18 to 20° 3' Shale Sandstone, Hardy out 2 1/2' White with bent sand Main leaf horizon 6' 4' 2' Shale Lignite Jewett Et. S.