Upper Devonian (Famennian) conodonts from radiolarian cherts, Loei Terrane, Loei Province, Northeast Thailand

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Published: Dec 31, 2015
Keywords:
Conodont Devonian palaeoenvironment tectonics Indochina Terrane chert

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Clive Burrett
School of Physical Sciences, University of Tasmania, Sandy Bay, Box 79, Hobart, Tasmania, 7001 Australia
Hathaithip Thassanapak
Applied Palaeontology and Biostratigraphy Research Unit, Department of Biology, Faculty of Science, Mahasarakham University, Kantarawichai, Mahasarakham 44150, Thailand
Mongkol Udchachon
Palaeontological Research and Education Centre, Mahasarakham University, Kantarawichai, Mahasarakham 44150, Thailand

Abstract

Conodonts from radiolarian cherts in the Loei Terrane of Loei Province, Northeast Thailand, include Palmatolepis triangularis, P. minuta minuta, P. minuta wolskae and polygnathids and indicate a Famennian crepida Zone age. These cherts are about 20 my younger than Givetian reef limestones and are unlikely to have been deposited in a major ocean but rather in a deep marine basin close to a volcanic arc.

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