Ribbed or Rogen Moraines
Landform assemblage of numerous, parallel, closely-spaced ridges consisting of glacial drift, usually TILL.
The ridges are formed transverse to ice flow in a subglacial position and are usually found in the central portions of former ice sheets.
Individual ridges are typically 10-30 m high, 300-1200 m long and 150-300 m wide, have a straight to arcuate planform, concave in the down-ice direction.
Their name derives from Lake Rogen in Sweden.
Ribbed moraine is the North American, and perhaps, the preferred term.