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The remains which do become embedded, if in sand or gravel, will when the beds are upraised generally be dissolved by the percolation of rain-water. I suspect that but few of the very many animals which live on the beach between high and low watermark are preserved. The molluscan genus Chiton offers a partially analogous case.
Beds of rock of any thickness crammed full of organic remains, may yet, either by the percolation of water through them, or by the influence of subterranean heat, lose all trace of these remains, and present the appearance of beds of rock formed under conditions in which living forms were absent.
At one moment he is 'yet breathing threatening and slaughter against the disciples of the Lord, and in almost the next he is prone on his face, asking, 'Lord, what wilt Thou have me to do? It was not a case of a landslide suddenly sweeping down, but long prepared for by the gradual percolation of water to the slippery understrata, but the solid earth was shaken, and the mountain crashed down in sudden ruin.
To Barbellion, by the light of his expiring lamp, was revealed what was hidden from nearly all experienced and active publicists. Is there any doubt still of the superiority of imagination over hard-headedness? Imagination instantly responds. Percolation is a slow process in the hard head of the worldly-wise.
The cause of the residue accumulating more in some places than in others, may be attributed to a layer of argillaceous matter having been left at an early period on the chalk, and this would check the subsequent percolation of earthy matter into it.
The fragments of coral which are occasionally cast on the "flat" are during gales of unusual violence swept together on the beach, where the waves each day at high-water tend to remove and gradually wear them down; but the lower fragments having become firmly cemented together by the percolation of calcareous matter, resist the daily tides longer, and hence project as a ledge.
In this the elephants contrive to sink wells for their own use by scooping out the sand to the depth of four or five feet, and leaving a hollow for the percolation of the spring. But as the weight of the elephant would force in the side if left perpendicular, one approach is always formed with such a gradient that he can reach the water with his trunk without disturbing the surrounding sand.
Nor can they be perpetuated for indefinite periods in a fossil state, unless imbedded in some matrix which is impervious to water, or which at least does not allow a free percolation of that fluid, impregnated, as it usually is, with a slight quantity of carbonic or other acid.
It was perhaps eight feet by seven in area and rather higher than either of these dimensions; the ceiling was of plaster, cracked and bulging in places, gray with the soot of the lamp, and in one place discolored by a system of yellow and olive-green stains caused by the percolation of damp from above.
He had not so much as loosened the blanket looped about his shoulders and which threatened to interfere with the movements of his arms. He held his rifle above his head, so as to prevent any water running into the barrel, either at the muzzle or by percolation at the vent, and swam with his other arm and his feet.
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