Abstract
Abstract The conclusions derived by J. R. L. Allen from studies of bedform development in flume experiments on erosion of weak beds have been applied to transverse erosional marks found on ventifacts in the McMurdo Oasis, Antarctica. The Antarctic bedforms are closely analagous with those produced in the flume experiments. Marks may be distinguished from weathering pits by using length/ depth and width/depth ratios as diiscriminatory indices. Exceptionally large marks are found to be attributable to the high lifting capacity, and hence large particles available for abrasion, of cold, dense air. A defective bed model of mark initiation is supported. Parabolic erosional marks are particularly reliable indicators of paleowind directions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
