10 J. D. Dana—Results of the Earth's Contraction. 
sedimentary material that was used in making the Appalachian 
and other rocks. Prof, LeConte also brings into his views such 
an elevation, and remarks upon its final disappearance. But 
neither of these authors states that he regards it as part of a 
system of oscillations set in motion by the lateral pressure 
resulting from the earth’s contraction, and a direct counterpart 
to the geosynclinal of the Appalachian region. Their views 
are adverse to such an idea, the subsidence with them being not 
due to contraction. 
The facts thus sustain the statement that lateral pressure 
produced not only the subsidence of the Appalachian region 
through the Paleozoic, but also, cotemporaneously, and as i 
essential prerequisite, the rising of a sea-border elevation, or ge- 
anticlinal, parallel with it; and that both movements demanded 
the existence beneath of a great sea of mobile rock. 
ovement and mountain-making over other parts of the 
Atlantic border (v, 436), and also the grand double series of 
events on the Pacific or Rocky Mountain border (vy, 438), 
plainly its characteristics even till Tertiary times. And did it 
continue on through the Tertiary and afford the floods of rock 
that were poured out from the deep fissures of this long era? 
And was it still in existence when the great floods were poured 
ous. An appeal to the other continents for further testimony 
is hardly necessary. 
The facts from the ocean seem to demand a vastly greater 
range for the under-crust mobile layer. The coral island subst- 
this be, it stands as a fact to be explained. 
In view of the conclusions here reached with regard to the 
earth’s interior, I present the following statements: 
