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A Siluro-Devonian carbonate sequence in northern Thailand

Authors
Journal
Journal of Asian Earth Sciences
0743-9547
Publisher
Elsevier
Publication Date
Volume
1
Issue
4
Identifiers
DOI: 10.1016/0743-9547(86)90016-4

Abstract

Abstract A 220 m thick sequence of calcarenites and calcisiltites at Mae Ping National Park, 100 km south of Chiang Mai, formerly mapped as Thung Song Limestone, is named the Mae Ping Formation. It overlies a tentaculitid-rich shale and contains abundant orthoconic, tabular-walled nautiloids which are known elsewhere in the Siluro-Middle Devonian of southern Europe and Australia. A conodont fauna from near the base contains Ozarkodina excavata excavata (Branson & Mehl) which indicates a Lower Silurian-Mid Devonian age for the Mae Ping Formation. Further mapping of limestones presently mapped as Thung Song may extend this formation over much of northern Thailand.

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