All the prominent rock-faces that look towards the Minch have been smoothed off and rounded, while in their rear the marks of rubbing and abrading are much less conspicuous.
Many of the more ancient mountain-chains and ranges, however, have been exposed so long to the abrading action of the denuding agents that all trace of their original contour has vanished.
Having satisfied ourselves that the rounded outline of the ground is the result of former glacial action, our next step is to discover, if we can, in what direction the abrading agent moved.
And there is no region in northern Europe where the immensity of the abradingagent can be more vividly realised.
The wire is the edge or burr which bends or turns over at the extreme edge of the tool, in consequence of that extreme edge giving way to the pressure of the abrading tool, be it a grindstone or an oilstone.
It is one of the most valuable of all whetstones, abrading the hardest steel, and possessing sufficient compactness to resist the pressure required for sharpening gravers.
The Falls of Niagara have retreated several miles from their original plunge; the carving of their channel has been wrought much less by the rushing waters than by their burden of abrading earth and sand.
The motion of ice, influenced by winds, tides, and currents, keeps constantly abrading the shore-line.
The floes have stopped abrading each other, and are driving ahead right peacefully, with our brig mounted on top: how far we are from the edges, it is too dark to see.
It is not unlikely that in the near future the electric furnace will furnish us with a number of products capable of replacing the diamond asabrading agents.
I think it best not to leave them to drain dry; better take up all moisture with the cloth, and vigorous rubbing will do no harm if the surfaces have no abrading material on them.
The actual abrading in such a case is done by the gritty particles of the sand, which mixed with water falls in a continuous stream from the hopper above.
It should be noted here that the cutting power of the water moving in the torrent or in the wave, the capacity it has for abrading rock, resides altogether in the bits of stone or cutting tools with which it is armed.
Thus they flow away over the rim rock in a perfectly pure state--a state in which, as we have noted before, water has no capacity for abrading firm rock.
The gist of the process is the employment of a jet of sand or other hard abrading material, driven at a high velocity by a blast of air or steam, under a certain pressure, in accordance with the character of the work to be done.
Polishing wheel, a wheel or disk coated with, or composed of, abrading material, for polishing a surface.
These have smoothed, even-abrading surfaces that are gently concave to convex.
Abrading Stones Two broad classes of abrading stones have been differentiated on the basis of form and inferred function (Treganza and Malamud 1950, p.
That this latter characteristic does not hold without exception seems to be due simply to the fact that some of the abrading stones appear to be reused manos.
It would suggest, then, that this class of abrading stones were involved in conjunction with wood working, the tangible evidence having been lost to us.
When the first strata were formed, the sediment must have been obtained entirely from igneous rocks, because only those rocks existed; but now it is obtained from every kind of rock which is exposed to abrading or decomposing agencies.
This fragmentary condition of the surface rock is such as exposes it to be acted upon readily by any powerfully abrading causes, or to be more rapidly disintegrated by atmospheric and aqueous causes.
What is the general tendency of theseabrading forces?
What other circumstance increases the abrading action of rivers?
That part of the figure below the line a a represents the outcropping edges as they now appear, the upper portion of the folds having been removed by some abrading cause.
What is the effect of waterfalls on the abrading action of rivers?
Accidental contact with some obstruction upon the floor may suffice to turn the fragment and so expose a new surface to wear upon the abrading floor.
The floor beneath the glacier is reduced by the abrading process to a more or less smooth and generally flattened or rounded surface—the so-called glacier pavement (Fig.
The tops of the pedestals thus come to be shaped by the plucking and abrading processes into flat domes (Fig.
Such minor projections upon the floor usually have their origin in some harder nodule which deflects the abrading tools and causes them to pass, some on the one side and some upon the other.
The material of the medial moraines is a collection of angular blocks whose surfaces are the result of frost rending, for in their travel above the ice they are subjected to no abrading processes.
By abrading the ground it was possible to represent rubies or sapphires, surrounded by pearls, in a setting of gold, but not both rubies and sapphires.
Supposing the beast were red, the glass painter would perhaps assist the natural inequality of the glass by abrading the ruby, by which means he could almost model the form in red.
Screens and draperies have often patterns in white and stain on ruby and other coloured grounds, produced by abrading the red and painting and staining the white thus exposed.
By ploughing up thousands of square miles, and exposing a surface for part of the year to the action of the elements, we assist the abrading force of rain, and diminish the conservative effects of vegetation.
But the waves are perpetually employed in abrading and fashioning the materials already strewed over the beach.
The meaning of this last verse is somewhat obscure; but, taken with the context, may be supposed to allude to the abrading power of floods, torrents, and rivers.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "abrading" in a variety of sentences. We hope that you will now be able to make sentences using this word.
