RT Journal Article
SR Electronic
T1 Notes on faceted slopes, rock fans and domes on granite in the east-central Sudan
JF American Journal of Science
JO Am J Sci
FD American Journal of Science
SP 194
OP 206
DO 10.2475/ajs.259.3.194
VO 259
IS 3
A1 Ruxton, Bryan P.
A1 Berry, L.
YR 1961
UL http://www.ajsonline.org/content/259/3/194.abstract
AB Fringing pediments separated by a sharp angular break from the hill slopes occur on residual hill masses in the east-central Sudan. Many hill masses also show several additional small facets of slope paralleling the contours. The faceted slopes, when stripped of debris, reveal plane and concave sheets of granite separated by steeply dipping joints. Rock fans are recorded on both fringing pediments and the lower hill slopes. Cone-shaped hills with straight sides appear to be modified to domes on stripping of their debris. Some domes retain concave and straight slope sides, whereas others become convexly faceted. Formation of faceted hill slopes and domes and development of rock fans from homogeneous rock are believed due to unloading. The effect of unloading is obvious when denudation was weak and slow on hard elastic rocks in a stable area.