General Geology of West Face of Southern Gunung Semanggol Transect,With Emphasis on Tectonic Evolution of the Area.

This research will be focused mainly on the general geology of West Face of Southern Gunung Semanggol and will be emphasize on tectonic evolution of the transect area. Semanggol Formation in Northwest side which is in Perak area is generally the typical Permo - Triassic rock which can be categorized in three types of rock, Sandstone, Conglomerates, and Chert. The oldest rock in this formation is the chert which probably come from Permian period, followed by sandstone and the youngest one is conglomerates. This formation is Young towards Northeast which has a lot of conglomerate was found towards there (Burton, 1973). Structures in the Semanggol range is said to be a very tight folding structure and consists of a series of asymmetrical folds having north-south trend. All the information gathered was used to generate the Geological map of the transect area, the topography profile cross section also being generated. These map and cross section are to show the distribution of the types of rock in the area and also the elevation of the transect area. The observations, measurements, and samples are taken to build a theory model of tectonic evolution process. Some lab analysis such as Petrography works from Thin Section analysis and XRF analysis are done to confirm the lithology in the transect area. Finally, model of the Gunung Semanggol is being modeled based on the features, data obtained from the lab analysis, lithology found, and tectonic evolution theory.