BULL. GEOL. SOC. AM. 



VOL. 17, 1905, PL. 50 



£j*. %x : 3Ei 



Figure 1. — A weathered Slope of Dwyka Tillite, near Matjesfonteix 



Figure 2. — One Side op the Poort, or Notch, of Witteberg River, Southwest of Laixgsburg 



DWYKA TILLITE AND WITTEBERG NOTCH 



