Seafloor sediments reveal East Antarctic ice halted retreat and advanced 40 miles

Researchers from Kiel University and the Alfred Wegener Institute studied the largest known grounding-zone wedge on East Antarctica's continental shelf. The sedimentary body is about 260 meters high, 65 kilometers long and over 580 cubic kilometers in volume, recording a pause in retreat when the ice advanced 40 miles.

• Grounding-zone wedge 260 m high and 65 km long found in Vincennes Bay
• Volume exceeds 580 cubic kilometers, the largest known on a glaciated shelf
• Sediments record a halt in retreat and a 40-mile ice advance