First documentation of early Silurian conodonts from western Thailand and its geological implications

doi:10.1016/j.jop.2024.08.010

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Abstract

The early Silurian conodonts are firstly described and illustrated from western Thailand. Samples were collected from the Kroeng Kravia Forest Park area for conodont and lithofacies analyses. An upper Telychian Lower Pterospathodus amorphognathoides amorphognathoides Subzone is recognized for the studied succession. Three lithofacies were identified from the carbonate succession, including stromatolite-thrombolite limestone, nodular limestone, and red limestone. Both analyses on lithofacies and conodont assemblages indicate a deeper marine depositional environment. The conodont fauna in the study area is similar to that from Baoshan of Yunnan Province and Langao of Shaanxi Province in West China and resembles that from similar depositional environments in Australia, Laurentia, and peri-Gondwana, suggesting good connections among these regions by ocean currents.

Key words： Silurian Conodonts Deep marine environment Western Thailand Sibumasu

Received: 15 February 2024

Corresponding Authors: ^*Excellence Center in Evolution of Life, Basin Studies and Applied Palaeontology, Palaeontological Research and Education Center, Mahasarakham University, Maha Sarakham 44150, Thailand. E-mail address: bthaithip@yahoo.com (H. Thassanapak). Peer review under responsibility of China University of Petroleum (Beijing).

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http://journal09.magtechjournal.com/Jweb_jop/EN/10.1016/j.jop.2024.08.010 OR http://journal09.magtechjournal.com/Jweb_jop/EN/Y2025/V14/I1/157

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