Glacial moraines are formed by the deposition of material from a glacier and are exposed after the glacier has retreated. They usually appear as linear mounds of till, a non-sorted mixture of rock, gravel and boulders within a matrix of a fine powdery material. Terminal or end moraines are formed at the foot or terminal end of a glacier. Lateral moraines are formed on the sides of the glacier. Medial moraines are formed when two different glaciers merge and the lateral moraines of each coalesce to form a moraine in the middle of the combined glacier. Less apparent are ground moraines, also called glacial drift, which often blankets the surface underneath the glacier downslope from the equilibrium line. COUNT 5
QSN1 When are glacial moraines visible? ANS1 after the glacier has retreated QSN2 How are glacial moraines formed? ANS2 deposition of material from a glacier QSN3 Where are lateral moraines found? ANS3 sides of the glacier QSN4 How are medial moraines formed? ANS4 when two different glaciers merge and the lateral moraines of each coalesce to form a moraine in the middle of the combined glacier QSN5 What are ground moraines also called? ANS5 glacial drift