From AMS Glossary
Ridges or deposits of rock debris transported by a glacier.
Moraines are left after a glacier has receded, providing evidence of its former extent. Common forms are ground moraine, formed under a glacier; lateral moraine, along the sides; medial moraine, down the center; and end moraine, deposited at the terminus.
Armstrong, T., B. Roberts, and C. Swithinbank 1973. Illustrated Glossary of Snow and Ice. Scott Polar Research Institute, Special Pub. No. 4, 2d ed.; The Scholar Press Ltd., Menston, Yorkshire, UK.