piedmont glacier
From Glossary of Meteorology
The lobe-shaped, expanded, terminal part of a valley glacier spread out over broad lowlands at the base of mountains.
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.