A DUNE CATENA ON CLAY PLAINS OF WEST CENTRAL GEZIRA REPUBLIC OF SUDAN

被引：15

作者：

WILLIAMS, MA

机构：

[1] Research School of Pacific Studies, Australian National University, Canberra

来源：

JOURNAL OF SOIL SCIENCE | 1968年 / 19卷 / 02期

关键词：

D O I：

10.1111/j.1365-2389.1968.tb01547.x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Fixed dunes occupy 400 000 acres in the west central Gezira. Isolated dunes occur sporadically through the central Gezira, and trend NW from Sennar on the Blue Nile to El Geteina on the White Nile. They probably originated as channel deposits laid down by former distributaries of the Blue Nile. Minor aeolian re‐sorting took place, and was followed by plant colonization and dune stabilization. Erosion of the dunes is locally active, resulting in exposure of the underlying clays. The catena comprises leached sands (Psammustents) on the dune crests and illuvial loams and clays (Orthustents) in the swales. Swale soils contain pedogenetic and relict lacustrine carbonate. The catena is often superimposed upon former soils, resulting in polygenetic profiles. Copyright © 1968, Wiley Blackwell. All rights reserved

引用

页码：367 / &