There are several western lobes of the Mount Bird icecap. One of these is Quaternary Icefall, which descends steeply into Wohlschlag Bay 1 mile (1.6 km) south of Cinder Hill. The site was mapped and so named by the New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1958-59, because of the Quaternary glacial period marine shells carried by the glacier and deposited in terminal moraines. Another such lobe is Shell Glacier.