movemen ol sad graind P orent FIGGURI1‘8 Beach drit a kishore currens are cre med bn obliquely breakin wnes Thee poxes tranport large quanti of meri akong th bex t and the surface ( Taa Collection Slimline, PuShed by Merrill Wishing Ca, columu (H Comm o 1, by Tasa Graphic Ats. In Al rights reserved