e/Washboard moraine

Information
has gloss	eng: A washboard moraine, also known as minor, DeGeer or annual moraine, is a geomorphic feature caused by glaciers. As the glacier melts it leaves behind an accumulation of rock debris. Annual glacial advances and recessions cause parallel ridges to form a few meters apart. Because the accumulation of debris is annual, the moraines do not get very large and stand only a few meters high. The name "washboard moraine" refers to the fact that, from the air, it resembles a washboard. Washboard moraines can be seen in many places such as South Dakota, Maine, and Iceland.
lexicalization	eng: Washboard moraine
instance of	(noun) matter that has been deposited by some natural process deposit, sediment