Analysis of Andesite Rock Distribution in the Batujajar Sub-Basin, West Bandung Regency

The Batujajar Sub-Basin, located in the western part of the Bandung Basin, features a distinctive basin-like morphology encircled by hills and mountains. This area contains a series of andesite intrusive hills formed through volcanic and magmatic activities in the western Bandung Basin, which effectively separate the Bandung Basin from the Batujajar Sub-Basin. These geological processes are estimated to have occurred during the Pliocene epoch, approximately 4 to 2 million years ago, with a predominantly north south orientation, resulting in a linear cone-shaped geomorphology. Research indicates that the geomorphology of the Batujajar Sub Basin ranges from flat to extremely steep, with moderately to strongly undulating hills, V-shaped valleys, and steep slopes. The topography is characterized by a series of hills creating a distinct relief pattern, underlain by volcanic lithology dominated by andesite and tuff. The area holds significant economic potential for the extraction of non metallic minerals and possesses abundant water resources, including the Citarum River Dam, which flows westward towards the Bandung Basin