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Mosasaur tooth 55-60mm
A river terrace is a remnant of a floodplain when the river still flowed through the landscape at a higher level. A floodplain is relatively flat. If the river erodes deeper into a part of the ancient river plains, the remaining part of the old floodplain remains as a sort of terrace. Sometimes multiple levels of river terraces occur above each other, each representing a period of erosion. The transitions between the river terraces are relatively steep, and the terraces themselves relatively flat. On the river terraces are often the fluvial deposits of sand and gravel is still noticeable in (small) outcrops.
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