Triassic conodont biostratigraphy in the Malay Peninsula

Abstract

Conodonts representative of the Lower, Middle and Upper Triassic are now known in the Malay Peninsula and all the Triassic Stages except the Rhaetian are represented. The best known sequence of Triassic conodonts occurs in the Kodiang Limestone ofKedah but there are still significant gaps in the known conodont succession. In particular, Griesbachian and Dienerian conodonts are poorly known and conodonts representative of the Upper Spathian, Lower Ladinian, Middle and Upper Norian and Rhaetian are unknown. New data from the Kodiang Limestone ofBukit Mulong and Bukit Kepelu help to fill some of these gaps in the Carnian and Norian conodont succession. The Chuping Limestone of Per lis has also recently yielded some Lower Norian conodonts which implies a correlation with the Kodiang Limestone to the south. Other recent discoveries include early Late Triassic (Lower Carnian) conodonts from the Chert Member of the Semanggol Formation, Kedah, Early Triassic (Spathian) conodonts from north-west Pahang and Early Triassic (upper Dienerian) and Middle Triassic (upper Anisian) conodonts from the Jerus Limestone, Cheroh, west Pahang.