Geology and Sedimentology of Transect I – East Face, Central Gunung Semanggol, Bukit Merah, Perak

Gunung Semanggol is part of the Semanggol Formation that extends from north and
south Kedah. There is less publication on the general geology of Gunung Semanggol
compare to the Semanggol Formation in Kedah, despite the named “Semanggol” are
taken from the mountain range. This project will focus on the geology and
sedimentology of Gunung Semanggol, by focusing on the East face of Central
Gunung Semanggol, Transect-1. Detail observation and data collection will be done
and recorded in the study area. 3 major facies observed in the field, namely black
shale facies, interbedded siltstone and mudstone facies and sandstone facies. Detail
sedimentary logging created on each outcrop shows the younging direction is towards
East and the facies are interpreted to be Rhythmite Member with overall coarsening
upward trend. Structural study show the major stress direction is West-East trending
and sedimentary dipping towards South-East direction. From the stratigraphical
analysis, the possible deposition environment for Gunung Semanggol is probably to
be in the outer shelf margin instead of deep marine setting. The sedimentary
distributions of study area are illustrated by the geological map and cross section
produced.