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Characteristics and Relationships of Soils from Volcanic Tuffaceous Materials in Colombia, South America
Author(s) -
Franco U. Alberto
Publication year - 1947
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1947.036159950011000c0080x
Subject(s) - citation , volcano , earth science , soil water , library science , political science , geochemistry , geology , computer science , soil science
CRGE areas of volcanic tuffaceous material of Tertiary origin occur in Colombia. The process of soil formation has been influenced by the climatic environment, the form of deposition of the materials, the topography, and the age of the deposits. The differences in soil characteristics vary as well as their suitability 'for use. The old Tertiary deposits were formed by the deposition of volcanic dust, mainly of andesitic composition, which, reworked by water action, have become hard and indurated. The more recent deposits consist of volcanic dust or ashes deposited by wind action. These are loess-like and more friable. The present study refers to the conditions predominant in the soils of the Upper Magdalena Basin, the Upper Cauca Area in the vicinity of Popayan, and in the Armenia and Pereira region in the state of Caldas (Fig. i).