The Ural Mountains present the aspect of a broad swelling whose strata no longer exhibit the horizontality which is characteristic of central Russia, and moreover are deeply cut into by rivers.
Stratified rocks when they have not been much disturbed from their original approximate horizontality weather into escarpments.
This framework is provided with guides on which the platform, whilst preserving its horizontality, is V the observer has to follow the eye-end in a comparatively small circle; another good point is the flattening of the cast-iron centrepiece of the tube so that the flange of the declination axis is attached as near to the axis of the telescope tube as is consistent with free passage of the cone of rays from the object-glass.
In some regions, notably in the Baltic province and in parts of the United States, the rocks still retain their original horizontality of deposition, the muds are scarcely indurated and the sands are still incoherent; but in most parts of the world they bear abundant evidence of the many movements and stresses to which they have been exposed through so enormous a period of time.
He argued also in favour of the original horizontality of sedimentary deposits.
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