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Published online by Cambridge University Press: 01 May 2009
THE object of the present paper is to give some geological description of the western range of the Andes, and the Tertiary formations which are developed along the Pacific coast. References are also made to the plutonic and other types of igneous rocks which are known to occur and have not been described hitherto. During the past four years the author has made a complete traverse of the Andes in Ecuador, viz, from Babahoya to Guaranda, thence to Riobamba and Baños, including the entrance to the Oriente.