MORRISON SHALES OF COLORADO AND NEW MEXICO 39 
Fic. 1.—Sketch map of Southern Colorado and Northern New Mexico. 
northern limbs of the uplift is practically the slope of the sur- 
face, and is indicated by the contour lines* of the accompany- 
ing sketch map. On these three sides, the uplift has been 
* The contours are taken from the maps published by the U. S. Geol. Surv. 
