78 Bibliographical Notices. 



Professor Lapworth among her British friends, Mrs. Ogilvie Gordon, 

 D.Sc, Ph.D., entered more fully into her projected work in the Tyrol. 

 After hard field-work, making important contributions to our know- 

 ledge of Alpine Geology, both as to the arrangement of strata and the 

 occurrence of fossils, she completed in 1901 the excellent geological 

 map which accompanies the paper before us. This brilliant and 

 solid geological work has been steadily continued and improved by 

 the same lady, as shown by her contributions to scientific periodicals*, 

 with elaborate and trustworthy descriptions of the region in explana- 

 tion of its complex structure. 



In these researches Dr. Ogilvie Gordon has always kept in touch 

 with the Continental Geologists working at the same problems. 



The Triassic masses in this region consist largely of Dolomites ; 

 and these are said by the Author to be isolated by faults. Folded 

 by many successive creeping movements of the Earth's crust, inter- 

 sected by slip-faults and thrust-faults, they have also suffered much 

 by local subsidences, and by repeated cross-faultings, with shear- 

 planes and their crush-breccias. 



The outlines of the mountains in some places have been likened 

 to that of upraised coral-reefs ; and, if really such, the dolomite 

 condition would not be strange, for it is known that corals become 

 dolomitized. Careful scrutiny, however, detects fossiliferous strati- 

 fication in some of the dolomite masses, but whether due to shells 

 or to beds (not reefs) of Coral on bases of calciferous Algals is not 

 settled. 



Both volcanic and deep-seated igneous rock-matter play important 

 parts in the make-up and physical character of the country. The 

 igneous magma has come up to the fissures of weakness in the various 

 rocks, either to spread out on the top or to lose itself in the cross- 

 cracks or in the side-planes and cleavage-lines. They take the 

 Geologist far afield in his science in finding and explaining the 

 origin, material, age, and mode of passage of the different veins, 

 dykes, and sills. Some of the intrusions appear to have been of an 

 age previous to the Triassic, some to have been contemporaneous 

 with it, and some decidedly to be of later (Tertiary) date. 



The following is given in a Table opposite page 19, in this " Special 

 Part " of vol. viii. Trans. Geol. Soc. Edinburgh [1903], as the succes- 

 sion of the Triassic formations in the South Tyrol : — 



Upper Trias. "j 

 About 370 metres, I Dachstein Limestone or Dolomite. 320 metres, 

 in the vicinity of j Raibl Marls, &c. 50 metres. 

 Fassa. I 



* Especially the 'Geological Magazine,' 1892, pp. 145, 147, and 381, 

 382 ; Quart. Journ. Geol. Soc. vol. xlix. 1893, pp. 1-77 ; Geol. Mag. 1894, 

 pp.1-10 and 50-60; Q.J. G.S. vol.lv. 1899, pp. 503-634; Geol. Mag. 1902, 

 pp. 309-317 ; and, lastly. Trans. Edinb. Geol. Soc. 1903, vol. viii. "Special 



