Figure 19.--Geologic map of the area of Groundhog Basin and vicinity, stop 5. Qrf, Quaternary rockfall deposits; Qrg, rock glacier; Tf (railroad track symbol, upper right), Tertiary felsite dikes and sills; PlPsc, Permian and Pennsylvanian Sangre de Cristo Formation, Crestone Conglomerate Member; PlPsl, Sangre de Cristo Formation, lower part; lPm, Pennsylvanian Minturn Formation, upper part.