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  _____      ___     _    _    __   __    _____   
 |__  //    / _ \\  | |  | ||  \ \\/ //  |__  //  
   / //    | / \ || | |/\| ||   \ ` //     / //   
  / //__   | \_/ || |  /\  ||    | ||     / //__  
 /_____||   \___//  |_// \_||    |_||    /_____|| 
 `-----`    `---`   `-`   `-`    `-`'    `-----`

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Text this: Typology and formation of pothole along the Mekong river and erosional remnant in sandstone of Khorat group, Ubon Ratchathani province, northeastern Thailand