Initial Report on OSL Dating from Pailin Beach Ridge Plain, Trat Province, Eastern Gulf of Thailand with Special Highlight to Record of the Holocene Sea Level Change
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Abstract
A long and narrow Pailin Beach is located in Trat province, the eastern coast of the Gulf of Thailand. The area is dominated by beach ridge plain that is preserved well with no anthropogenic disturbance. This area is appropriate for relating beach evolution with sea-level change. The coastal geomorphology is classified into 4 units including the former sand beach, recent sand beach, old lagoon, upland and mountain. The physical properties of the beach ridge sediments are composed of fine sand, moderately well to well-sorted, and high quartz content. Age determination by optically stimulated luminescence (OSL) dating reveals the formation of beach ridges related to sea-level changes from middle to late Holocene. The beach ridge began to form around 3,230 ± 250 years ago to 1,750±150 years ago. The decreasing age reflects the gradual fall of the sea level during that time.
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Copyright © 2008 Department of Geology, Faculty of Science, Chulalongkorn University. Parts of an article can be photocopied or reproduced without prior written permission from the author(s), but due acknowledgments should be stated or cited accordingly.
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