Page:Field Notes of Junius Henderson, Notebook 2.pdf/63

 the syncline however, east, northeast and northwest of, a peculiar condition exists. East of is a fold (anticline) in the Lyons and Fountain which is cut of entirely from the strata east and west. A cross section from  east through  and on to the plains is as follows: ((drawing in field book, W to left)). At  the Dakota, Lykins and Lyons butt squarely into mica schist  and play out. The Dakota does not appear to be dragged up, nor does the Jura, but the Lykins is dragged up sharply thus: ((drawing in field book)).