Bukit Bunuh Case Study

Due to the discovery of shock metamorphism rocks (suevite breccia) and melted original rocks scattering in the southern area of Bukit Bunuh, it was suspected that the area had the possibility of being impacted by meteorite. The founded boulders made the archaeologists from the Centre for Global Archaeological Research (CGAR) of Universiti Sains Malaysia (USM) to propose of the possibility of Bukit Bunuh as a meteorite impact site. This proposal was led to intense research in the area by utilizing geophysical methods for meteorite impact crater mapping. During preliminary remote sensing study in 2004, significant geological features resembling the meteorite impact crater ring was mapped via aerial photograph (Nawawi et al., 2004). The impacted
This study area is located in Hulu Perak which consists of Kroh, Grik, Lawin, and Lenggong. Bukit Bunuh lies between Titiwangsa Range and Bintang Hill where it is believed to be a valley a long time ago. The area consists of metasediment rock (schist), Quaternary sediment and small units of tephra dust (also known as Toba volcanic ash) as shown in Figure 1. The granitic rock is from Jurassic end-Carbonaceous low era dominated the whole of Lenggong valley and originated from Bintang Range at the west of Lenggong (Mokhtar, 1993). Most of the alluvium units are located along the river area where the quaternary sediments containing alluvium and tephra dust. Bukit Bunuh’s topography is 600 ft above MSL (mean sea level). Sungai Perak that flows from north to south located at the east of Bukit Bunuh and at 61 feet MSL. Bukit Bunuh consists of the older granitic rock. 200 million years ago, during the Mesozoic era, granite intrusion occurred throughout Malaysia (Alexander, 1962). Bukit Bunuh shows evidence of meteorite impact based on the surrounding geological characteristic. It is believed that there was a meteorite impact that shaped the surrounding topography. The important characteristics rocks still remain in the area are quartz, chert, flint and suevite breccia (impact product) (Nawawi et al., 2004). Site observation indicates the presence of suevite rock around Bukit Bunuh in various sizes and shapes
The gravity method works when buried objects have different masses, which produced by the object having a greater or lesser density than the surrounding material. The objective of the gravity survey is to associate variations with differences in the distribution of densities and hence rock types (Sheriff,