ICE-FLOW FEATURES ON ICE STREAM-B, ANTARCTICA, REVEALED BY SPOT HRV IMAGERY

Numerous features of glaciological significance appear on two adjoinin g SPOT High Resolution Visible (HRV) images that cover the onset regio n of Ice Stream B, Antarctica. Many small-scale features, such as crev asses and drift plumes, have been observed in aerial photography. Subt le large-scale features, such as long flow traces that have not been m apped previously, are clear in the satellite imagery. Newly discovered features include ladder-like runners and rungs within certain shear m argins, flow traces that are parallel to ice flow, unusual crevasse pa tterns and flow traces originating within shear margins.