medial moraine

A short distance above the glacier's terminus the medial moraine and the ever-broadening marginal bands come together.

The glacier of the Aar represented in the wood-cut below affords a striking example of a large medial moraine.

When two glaciers unite, their inside lateral moraines join and form a medial moraine.

A medial moraine cannot be formed in this way, since no rock fragments can fall so far out from the sides.

When two glaciers flow together, one marginal moraine from each will coalesce to form a medial moraine.