Triassic Radiolarian Biostratigraphy of the Semanggol Formation, South Kedah, Peninsular Malaysia

Abstract

Abstract: Thirty-seven taxa of Permian radiolarians were retrieved from chert samples collected from an outcrop at a construction site approximately 4.5 kIn east of Kuala Ketil Town. The chert samples were collected from interbedded siliceous shale, chert and tuff facies and thinly bedded chert facies. Five radiolarian assemblage-zones were recognized i.e. Pseudoalbaillella scalprata In. rhombothoracata Zone, Follicucullus monacantha Zone, Follucucullus porrectus Zone, Neoalbaillella ornithoformis Zone and Neoalbaillella opima Zone. The radiolarian zones represent an age range from late Early Permian to Late Permian.