LATE TRIASSIC RADIOLARIA FROM THE KODIANG LIMESTONE, NORTHWEST PENINSULAR MALAYSIA

Two different cherty packstone-wackestone facies are exposed at an aba ndoned limestone quarry at Bukit Kodiang, Kedah. Chert occurs as disco ntinuous layers and nodules in the cherty packstone-wackestone. The th ickness of individual chert layers varies from 2 to 10 cm. The facies exhibit slump folds. Eighteen species of Radiolaria were identified-Ca pnuchosphaera triassica De Wever, Triassocampe sulovensis Kozur and Mo ck, Tetraporobrachia asymmetrica Kozur and Mostler, Xenorum flexum Blo me, Canoptum laxum Blome, Palaeosaturnalis triassicus Kozur and Mostle r, Canoptum cf. farawayensis Blome, Pseudostylosphaera cf. spinulosa N akaseko and Nishimura, Hagiastrum cf. augustum Pessagno, Perispongidiu m sp., Capnuchosphaera sp., Sarla sp., Kahlerosphaera sp., Canoptum sp ., Latium sp., Paronaella sp., Sontonaella sp., and Spongostylus sp. T he assemblage indicates that the age of the chert bearing strata range s from late Carnian to middle Norian, Late Triassic.