ABSTRACT
This chapter describes the results of the monitoring, by total station and photogrammetric surveys, of the movements of a slow compound rock slide from failure in 2003 to December 2006. The geology of the Gunung Pass area consists of a sequence of sedimentary rocks, probably of Paleozoic age, which have undergone low-to mediumgrade dynamic metamorphism. Viewed in plan the vectors are seen to be normal to the slope face contours with lateral extension revealed by radial divergence, conforming to topography, which takes the form of a subdued ridge. Movements are greater at the head than in the toe zone and, on any slope face contour, displacements are greater in the north than in the south. The landslide is a slow rock slide in schist. Failure occurred in September 2003 and by December 2006 the head had moved downwards more than 21 m.
