278 PETROLOGICAL ABSTRACTS AND REVIEWS 
cleavage, hardness, elongations, orientations, refractive indices, optical 
characters, and axial angles is given. There are also lists giving the 
compositions, transformation-points, and melting-points. 
Ricuarps, H. C. ‘The Volcanic Rocks of South-Eastern Queens- 
land,” Proc. Roy. Soc. Queensland, XXVII (1916), 105-204, 
pls. 11, including one map, and many chemical analyses. 
The area here described embraces some 4,000 square miles in south- 
eastern Queensland. The region was one of considerable igneous 
activity, the volcanic products being approximately 3,000 feet in thick- 
ness and divisible into three well-marked series. The upper division 
has a maximum thickness of 2,000 feet and is made up of basalt, andesitic 
basalt, and basalt flows. Some pyroclastic material occurs. The 
middle division has a maximum thickness of 1,000 feet and is made up 
of flows and plugs of acid and sub-acid lavas and considerable pyro- 
clastic material. The lower division has a maximum thickness of 1,500 
feet, though it averages only too feet, and is made up mainly of basic 
lavas with some andesite. With the exception of the Brisbane tuffs, 
the age of the flows is Cainozoic. The genetic relationship between the 
rocks is shown by various diagrams. The author thinks that the alkaline 
rocks in this region were not formed by the assimilation of limestone, 
and does not find evidence of the association of sub-alkaline rocks with 
folded earth movements. . 
Rinne, F. ‘“‘Beitrage zur Kenntnis der Kristall-Rontgeno- 
gramme,” Ber. math.-phys. Kl. k. sdchs. Gesell. Wiss. Leipzig, 
LXVII (1915), 303-40, figs. 27, pls. 20. 
Describes apparatus used and gives results obtained by the examina- 
tion by the R6éntgen rays of variously oriented crystals. 
RINNE, F. “Metamorphosen von Salzen und Silikatgesteinen,”’ 
Jahresb. d. Niedersichs. geol. Vereins zg. Hannover, 1914, 
252-69. 
Shows the effects of hydro-, hydrothermal-, pressure-, and 
hydrothermal-pressure-metamorphism on salt deposits, and compares 
the results with those produced in silicate rocks. The causes and the 
results produced in the salt alterations are broadly the same as those 
produced in the silicate rocks. 
