( 5 ) 
than the hornblende. A similar series of beds was described bv 
J 
Jackson on Neutaconkanut Hill, near Providence, and Prof. J.D. 
Dana mentions another a dozen miles west of New Haven.* It 
is also not uncommon in metamorphic regions everywhere. It 
appears probable from Jackson that this series is older than the 
conglomerate and was forced up in a double fault by the pressure 
which formed the anticlinal and synclinal on either side, or else 
these rocks formed an island, around which the conglomerate was 
deposited and afterwards elevated. The curvature of some of 
the ridges may be attributed to thcN.—S. action of the ice stream 
upon the upturned edges of strata, striking N. 20 E., true, the 
glens between the ridges to the erosion of the softer schists, and 
the relative abruptness of the southern to the northern ends of the 
ridges to the usual operation of glacial erosion. 
EXPLORATIONS IN THE NORTHERN ROCKY MOUNTAINS, 
By PROF. RAPHAEL PUMPELLY.f 
REMARKS ON SOME OF THE EVIDENCES OF GEOLOGICAL 
DISTURBANCE IN THE VICINITY OF NEWPORT, 
By T. NELSON DALE.}: 
Geologists returning from the far West tell us of vast tracts 
there, with great thicknesses of strata lying in almost horizontal 
position, having suffered but little change cither in their mineral- 
ogical constitution, or in their structure since their deposition by 
* Manual of Geol. 3d Edition, page 761. 
t Read before the Society on September 7th, 1SS3, but unavoidably omitted from the Pro- 
c edinirs for this year. 
J Read before the Society on October 4th, 1SS3. 
