780 PETROLOGICAL ABSTRACTS AND REVIEWS 



of analyses with recomputations in the C.I.P.W. system are given. 

 Among the rocks are syenite, canadite, nephelite-pegmatite, various 

 contact rocks, hornblende-nephelite rock, monmouthite, biotite-nephelite 

 rock, and pegmatitic nephelite-syenite. The writer thinks that the close 

 association of the granite-pegmatite with the nephelite-syenite indicates 

 that they originated from a primary granite magma at about the same 

 time. Following Daly, he thinks that the nephelite-syenites were pro- 

 duced by the action of limestone on the granite magma. 



Goldman, Marcus I. " Petrographic Evidence on the Origin 

 of the Catahoula Sandstone of Texas," Amer. Jour. Sci., 

 XXXIX (1915), 261-87, figs. 12. 

 Thinks the Catahoula sandstone originated from wind-blown sand 

 in an arid region. The arrangement of fossils indicates subaerial burial 

 in blown sand in some cases, and burial by wind, but in a quiet body of 

 water, in others. Evidence for the interpretation of disintegrated sedi- 

 ments in general is considered in detail. 



Kato, Takeo. "Mineralization in the Contact Metamorphic 

 Ore Deposits of the Ofuku Mine, Prov. Nagato, Japan," 

 Jour. Geol. Soc. Tokyo, XX (1913), 13-32, pi. 2, figs. 3. 



The copper ores of the Ofuku mine are contact metamorphic deposits 

 in sedimentary rocks at a short distance from an igneous body. They 

 are accompanied by typical contact minerals, such as wollastonite, 

 garnet, vesuvianite, etc., which were deposited metasomatically from 

 solutions derived from the igneous magma. The character of the solu- 

 tions changed gradually during the period of metamorphism. At first 

 they were very siliceous; later they became more basic, and rich in iron 

 and silica and with more or less sulphide ores, and finally very basic and 

 rich in copper and iron sulphide and poor in silica. 



Koto, B. "On the Volcanoes of Japan," Jour. Geol. Soc. Tokyo, 

 XXIII (1916), 1-13, 17-28, 29-55, to be continued. 

 These three papers represent the beginning of a series of articles by 

 Doctor Koto on the Japanese volcanoes. Of the 170 post-Tertiary 

 volcanoes of Japan, 55 are active. All the recent lava is andesitic, but 

 some of the earlier flows were plagioliparite and basalt. The writer 

 describes each volcano in brief form, classifying the cones according to 

 the system proposed by Schneider, and gives references to previous work. 



