Physiographic Sections of the Guiana Highlands, Venezuela and Guyana.

摘要

This report discusses the nature of the Guiana Shield and delimits meaningful subdivisions. The Shield contains the Guiana Lowlands, Guiana Hills, and Guiana Highlands, all physiographic provinces. To subdivide the Guiana Highlands into smaller units the geology, geomorphic features, soils, and vegetation were analyzed. This is in contrast with earlier studies which used river basins as physiographic sections. The analysis resulted in the formulation of three physiographic sections, the Sierra de Imataca, the Tepui Section, and the Western Highlands Section.