PETROLOGICAL ABSTRACTS AND REVIEWS 493 



Beck, Kurt. " Petrographisch-geologische Untersuchung des 



Salzgebirges an der oberen Aller im Vergleich mit dem Stass- 



furter und Hannoverschen Lagerstattentypus," Zeitschr. f. 



prakt. Geol., 191 1, pp. 23, figs. 6, pi. 1. 



Discusses the sequence of deposition and the characters of certain 



salt deposits, and compares them with the well-known deposits in Stass- 



furt and Hannover. 



Beck, Kurt. "Petrographisch-geologische Untersuchung des 



Salzgebirges im Werra-Fulda-Gebiet der deutschen Kalisalz- 



lagerstatten," Zeitschr. f. prakt. Geol., XX (191 2), 133-58, 



figs. 12, pis. 2. 



Discusses the stratigraphical and structural relationships of the salt 



deposits of Werra and Fulda. 



Beger, P. J. " Zinnerzpneumatolyse und verwandte Erschein- 

 ungen im Kontakthofe des Lausitzer Granits," Neues Jahrb. 

 Min., Geol., und Pal., 1914 (II), 145-82, figs. 4, pis. 2. 

 The writer discusses the contact zone of the Lausitz granite, describes 



various pegmatites, greisens, etc., and concludes that the chlorite in the 



highly metamorphosed greywacke is a pneumatolytic mineral due to the 



adjacent granite. 



Benson, W. N. "The Geology and Petrology of the Great Ser- 

 pentine Belt of New South Wales" (in five parts), Proc. 

 Linnean Soc. New South Wales, XXXVIII (1913), 490-517, 

 569-96, 662-724; XL (1915), 121-73, 540-624; maps 6, 

 figs. 29, pis. 10. 

 The region described in these papers passes north and south through 

 Tamworth, and lies between Sydney and Brisbane, about 280 miles 

 from the former. Through the center of the region extends a north- 

 and-south fault, separating it into two portions. Along this fault is 

 a series of intrusions of rocks now serpentine, not continuous but form- 

 ing separate patches from 100 yards to 30 miles in length and from a few 

 inches to nearly two miles in width. The formations indicate that 

 after a long period of sedimentation heavy orogenic pressure came from 

 the east, folding and metamorphosing the eastern series, but having 

 less effect on the western. The pressure caused the formation of an 

 overthrust fault which became the channel for the ascent of certain 



