Abstract:WITH 3 TABLES. 3 FIGURES AND 2 PLATES Ⅰ. INTRODUCTION Loess or Huang-tu has since long become an interesting geological problem. Von Richthofen,~1 Pumpelly~2 and Willis~3 have extensively described and discussed the nature and origin of the loess. Other articles written by various authors are widely scattered in different literatures and almost each has a