Often, rimstone is covered with small, micro-gours on horizontal surfaces. Rimstone basins may form terraces that extend over hundreds of feet, with single basins known up to 200 feet long from Tham Xe Biang Fai in Laos.
Often, rimstone is covered by tiny micro-gours on horizontal surfaces. Rimstone basins can create terraces that stretch over hundreds of feet, with individual basins reaching up to 200 feet long in Tham Xe Biang Fai, Laos.