Permian Limestone of Peninsular and Western Thailand in Khao Yoi, Cha-am and Thong Pha Phum Areas

Abstract

A paleontological study was carried out on limestone samples collected during field work in March of 2011 in two areas in northern Peninsular Thailand (Khao Yoi and Cha-am areas in Petchaburi Province) and single area in western Thailand (Thong Pha Phum in Kanchanaburi Province). Limestone at Khao I-bit (Khao Yoi area) was rich in fusulines, indicating an Upper Murgabian (Middle Permian) age. At Khao Nang Phanthurat and Khao Tachin (Cha-am District), corals and fusuline fossils in limestone belong to Middle Permian. In Thong Pha Phum area near Khao Laem Dam (Thong Pha Phum District), fossils similar to those of Khao Yoi and Cha-am areas were found, and a few thin sections suggested a Shan-Thai fauna. The present study suggests that Middle Permian limestones of Peninsular and western Thailand yield similar faunas which are typical of the Shan-Thai (Sibumasu) Block.