Notices of Memoirs—President’s Address to Section C. 409 
igneous rocks of the area are essentially fissure accumulations of 
lava, continuous with a rim of marginal sills which had found entry 
amidst the indipping strata of the surrounding Mid-Triassic flexures. 
The leading east-west eruptive fissure of Bufaure, and a parallel 
fissure at Rodella Hill on the north, may be traced continuously 
eastward to the Fedaja and Buchenstein district, and westward 
through the slopes of Duron Valley to Seiser Alpe. Both on the 
north and south margins—for example, at Plattkofl and Sasso Pitschi 
on the north margin, and at Mairin Wand, Udai, Molignon, 
Rossziihne, and Schlern on the south margin—there is a rapid 
passage of all or part of the lavas and tuffs of the fissure facies 
into calcareo-dolomitic rocks of the same age. The still higher 
horizons of Schlern Dolomite can in some places, such as Pordoi in 
Sella Massive, be seen to give place to the ‘‘Schlern Plateau facies’’ 
_ of Raibl strata, which locally includes thin lavas, or to pass insensibly. 
upward into well-stratified Raibl horizons of dolomite. 
Round the west of the Seiser Alpe area, the Bufaure and Rodella 
east-west eruptive fissures become continuous with the leading east- 
west eruptive fissure which in Mid-'Triassic time was active along the 
north of Seiser Alpe, the Langkofl and Sella Mountains, and the 
St. Cassian-in-Enneberg meadowland. This fissure is the ‘‘ Pitzculatsch 
fault” in my Grdden Pass section (Q.J.G.S. 1899, vol. lv, pp. 567— 
569), and is that against which, subsequently to Mid-Triassic eras, 
the ‘‘ Montesora segment ’’ was pinched up between the fissure facies 
and the dolomitic. . 
The general conclusions which I draw from these observations will 
be fully set forth in the published paper, which will be accompanied 
by an illustrative series of parallel sections. 
INN'S tem S Oi AVE EVE@ ae Se 
Britisa Association FoR THE ADVANCEMENT OF SCIENCE: SEVENTY- 
SEVENTH ANNUAL (GENERAL MEETING HELD AT LEICESTER, 
Aveust Ist, 1907. 
I.—Appress To THE Geotocican Section. By Professor J. W. 
Greeory, D.Sc., F.R.S., President of the Section. 
I. The Geological Society of London.—1907! This is the centenary 
year of the Geological Society of London; next month the British 
geologists will celebrate the event, and their pleasure will be 
enhanced by the sympathetic presence of a distinguished company 
of foreign geologists. 
With a just feeling of satisfaction may we celebrate this event ; for 
to the Geological Society of London is due the conversion of geology 
from a fanciful speculation to an ordered science. Yet so quietly has 
this society done its work that the debt due to it is inadequately 
realised. When we consider what the world owes to geology in 
respect of its economic guidance, the intellectual stimulus of its 
conceptions, the reverence it inspires for the venerable and majestic 
