A review of the Palaeozoic lithostratigraphy of east Johor, Malaysia

A revision on the Palaeozoic lithostratigraphy of east Johor has been made. The Palaeozoic of east Johor comprises of the Mersing Formation, Murau Formation, Dohol Formation, Linggiu Formation, Sedili Volcanic, Jasin Volcanic and Pengerang Tuff. The pre-Permian Mersing Formation, the oldest known rock unit is entirely made up of metamorphosed sedimentary rock of shallow marine origin. Unconformably overlying this unit is the Murau Formation which developed in a small continental faulted basin. The siliciclastic Dohol Formation containing late Early to early Middle Permian Sumalayang limestone as well as the Late Permian Linggiu Formation are also unconformably overlying the Mersing Formation, as are the volcanic units of Pengerang Tuff, Sedili and Jasin Volcanics. The three volcanic units are thought to be contemporaneous and are closely related to the Early to Middle Permian Dohol Formation and the overlying Late Permian Linggiu Formation. The absence of volcanic clasts in the Murau Formation indicates that the later is a prevolcanic, hence pre-late Early Permian formation. The shallow marine Linggiu Formation and the associated volcanic rocks are the youngest Palaeozoic formation in east Johor