"This paper describes briefly several hitherto unpublished localities, and points out that the extensive phyllites and possibly even the schists of the Cordillera are of Paleozoic age." The confusion between the Cocuy series of Cretaceous age, found only in the eastern part of the range, and the Giron series resting on Paleozoic strata and disconformably overlain by lower Cretaceous beds is cleared up.

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