About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 49 (1965)

Issue: 10. (October)

First Page: 1767

Last Page: 1767

Title: Ripple Marks in Motion: ABSTRACT

Author(s): Herbert J. Summers

Article Type: Meeting abstract


Ripple marks on sand dunes were observed by means of time-lapse motion picture photography as they moved with wind in their natural environment. When the film is projected the ripples appear to move rapidly. A wind-velocity meter was arranged to show in some of the pictures enabling instantaneous values to be read and correlated with ripple movement. Various modes of movement are shown including ripples reforming on areas which had been smoothed, ripples changing direction as wind direction changed, and wave lengths changing after the addition to an area of coarser sand.

End_of_Article - Last_Page 1767------------

Copyright 1997 American Association of Petroleum Geologists