OF THE DEPENDENT ISLES OF TAIWAN. Ö7 



CONTENTS. 



Page- 



I'he llôko Group (IVseadores) 1 



I. Intnxluctoiy 1 



II. Stratigraphical Char;;cteristic.s 5 



Hoko Island 5 



General outlines of the ,i:eology of the island 5 



Local details of ideology 8 



Haku-sha Inland 12 



Kippai Island 13 



Gio-o Island 14 



III. Petrography of the Eifusives 17 



^4. Component-minorals of Basalts ■ 18 



Olivine 18 



Plagioclase 22 



Augite 24 



Hypersthene 26 



Analcime and Natrolile 28 



The Iron Ores 30 



B. Special Descrijjtion of Individual Occurrence uf Basalts 33 



a. The granual type 33 



6. The type of the Iddingsite-bearing Basalts 35 



c. The ophitic type 38 



d. The type of the Olivine-less Basalts 39 



e. The type of the Analcite-bearing Basidts 42 



The Island of Kôtô (Kotel-Tobago) 46 



a. Felspar-Basalts 48 



b. Hornblende- Andésites 50 



c. Apoandesites 52 



d. Amphibolized Gabbro 54 



e. Serpentine 54 



Tlte Isle of IvasUô (Saiuasaiia) 55 



