Petrified wood of the genus Agathoxylon on the nature trail at Phu Por fossil site, Kham Muang District, Kalasin Province, Thailand
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Abstract
A comparative anatomy of the Mesozoic petrified wood was conducted at the Phu Por fossil site in Kham Muang District, Kalasin Province. The objective is to classify the petrified wood species found along the nature trails, contributing to the development of the Kalasin Geopark and conservation tourism or natural tourist attractions focused on Mesozoic-era petrified wood in Thailand. A total of seven samples were studied using the thin section technique, revealing the presence of one genus of petrified wood, Agathoxylon. Agathoxylon sp. is characterized by the presence or absence of growth rings, thin or thick-walled thacheis, 1 – 2-seriate alternate or opposite in radial walls, 1 – 2-seriate rays, and araucarioid cross-field pits.
Examining and analyzing the growth rings of petrified wood allows for paleoclimate predictions. It was found that the samples had both clear and unclear growth rings, suggesting these trees experienced humid weather with alternating short dry seasons during the middle to late Jurassic. The presence of Agathoxylon with growth rings implies a humid climate, while the discovery of Xenoxylon from previous studies supports a cool and wet climate hypothesis. Additionally, variations in growth rings may be due to incomplete mineral replacement during petrification or other geological processes. Developing Phu Por fossil site into an eco-tourism destination can significantly benefit the local economy. Furthermore, it will enhance the scientific and educational value of the site, contributing to Kalasin Geopark's recognition as a national and international tourist and research hub.
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References
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