Page:Field Notes of Junius Henderson, Notebook 2.pdf/119

crops, overlaid by granite and gneiss debris, with s.s fragments more common to the westward. Some of the granite boulders are a foot in diameter. In the bluffs NE of Round Butte Round Butte a massive s.s., light colored but not white, which I supposed Laramie, proved to contain Fox Hills spp about half way up. . It was about 40 feet thick at east end, underlaid by dark (Pierre?) shales and unconformably overlaid by a very hard pink to red conglomerate, mostly granite pebbles etc. up to half an inch in diameter, looking just as portions of the Fountain except for larger sandstone fragments contained up to 2 ft in diameter. The F.H. s.s. thins out to the west and then the conglomerate is eroded away leaving the Pierre exposed toward the foothills. Reached a ranch on sec 10 and got some alkali water out of a spring at 1 p.m. then climbed the foothills and went N along the “Dakota” ridge to where the Tertiary transgresses its edges. Here the “Dakota” has an