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Book Chapter

Fragmented Andean Belt of Northern Colombia

By
Walter Alvarez
Walter Alvarez
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Published:
January 01, 1971

The three ranges of the Colombian Andes have distinct geologic characteristics. The Central Cordillera is an uplifted zone of crystalline rocks, mostly pre-Mesozoic in age. The Western and Eastern Cordilleras are composed, respectively, of eugeosynclinal and miogeosynclinal rocks, deposited during the Mesozoic, and deformed in Late Cretaceous and Tertiary time. Although the Andes as a topographic feature end at 8° N. lat, pre-Tertiary rocks are found to the northeast in the Santa Marta-Perijá region and the Guajira Peninsula. Recent work has shown that a three-fold structure, similar to that of the Andes, characterizes these regions as well, suggesting that the Andean mobile belt was more extensive than the present day topographic Andes.

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Contents

GSA Memoirs

Caribbean Geophysical, Tectonic, and Petrologic Studies

Thomas W. Donnelly
Thomas W. Donnelly
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Geological Society of America
Volume
130
ISBN print:
9780813711300
Publication date:
January 01, 1971

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