CONTENTS 



OF VOL VI. PART II. 



PAGE 



Sketch of a Geognostic View of South America, on 

 the North of the River of the Amazons, and on the 

 East of the Meridian of the Sierra Nevada de 

 Merida - - - - - - - - 391 



SECTION I. 



Configuration of the Country. — Inequalities of the Soil. 

 Chains and Groups of Mountains. — Ridges of Par- 

 tition. — Plains or Llanos - - - 393 



SECTION II. 



General Partition of Lands. — Direction and Inclina- 

 tion of the Layers. — Relative Height of the Forma- 

 tions above the Level of the Ocean - - - 575 



SECTION III. 



Nature of the Rocks. — Relative Age and Superpo- 

 sition of the Formations. — Primitive, transition, se- 

 condary, tertiary, and volcanic Soils - 597 



1. Co-ordinate Formations of Granite, Gneiss and 

 Micaslate 600 



2. Formation of Clayey-slate (Thonschiefer) of Mal- 

 passo - - - - - - 613 



3. Formation of Serpentine and Diorite (Greenstone 



of Juncalito) . - - - - - - 615 



4. Granular and micaceous Limestone of the Morros 



of San Juan - - - - - 616 



