General geology and very low-grade metamorphic rocks mineral assemblages determination in Tugu Peringatan Timur-Barat Highway, Gerik, Perak.

Baling Formation had undergone regional and dynamic metamorphism of the deep marine sedimentary rocks which dated in Early Silurian-Devonian. This study is presents the newest structural data that situated between latitudes of 50 34' 21" N to 50 32' 97" N and longitude of 1010 25' 45" E to 1010 24' 01" E. The objective of this study was to produce a geological map of Gerik Highway, Perak on a scale of 1 - 25000 and to determine the sequences of mineral assemblages associated with metamorphism in the study area. Geological mapping and petrography analysis to identify the mineral sequences in the research area were two of the methods used to achieve the objective. Geological study shows the features of the area was dominated with sedimentary rock such as sandstone, mudstone, and shale, with the minor occurrence of metamorphic rocks which was phyllite. From the field study, the left side of the study region was contain of sedimentary rocks based on the sample collection while starting from the west side of the box, a transition of two different rock types occurs in the middle part of the exploration from sandstone to low-grade phyllite, with the lowest intensity of regional metamorphism through the west part of Banding Island. Due to the dense vegetation in the study area, the precise location of the transition process that occurred is still remain unknown. There are no logging or agricultural operations taking place in the remaining portion of the study area, which is covered in dense forest. The foothills of the Gerik Highway are interspersed at the foothills of the range, with two types of hills: elongated hills and isolated hills. The founding in the research shows some majority of structures, according to structural evidence, include joints, faults, quartz veins, overturned folds, anticline and syncline. Direction of major folds and their cleavage indicates the location of the axial planes of the major folds and their overturning directions. In conclusion, the study area had a low percentage of metamorphic rock.