United States or Benin ? Vote for the TOP Country of the Week !
Take the case to which I have previously referred. The finer or coarser sediments that are carried down by the current of the river, will only be carried out a certain distance, and eventually, as we have already seen, on reaching the stiller part of the ocean, will be deposited at the bottom.
We have no proof that the deep ocean ever occupied any part of where North America now is. The Middle and Upper Cambrian strata are found together with the Lower Cambrian over the area of both the eastern and the western mediterraneans, so that here the sea continued during the entire period. The sediments throughout are those of shoal water.
Fossils are far more abundant in the Paleozoic than in the earlier strata, while the sediments in which they were entombed have suffered far less from metamorphism and other causes, and have been less widely buried from view, than the strata of the pre-Cambrian groups.
In most cases, however, the cutting action of the streams has been sufficient to bring the drainage channels down to the bottom of the trough, while the influx of sediments has served to further the work by filling up the cavities.
It was weaker also than the region to the west, since there the sediments were much thinner. Besides, by the long-continued depression the strata of the trough had been bent from the flat-lying attitude in which they were laid to one in which they were less able to resist a horizontal thrust.
He not only removes from the wine its sediments, but watches the fermentation, and checks it as soon as its vinous fermentation is over, and the formation of vinegar about to begin. He refines his wine by an addition of foreign substances if necessary; he sulphurizes it; and, by one means or another, remedies its distempers.
At the time of the greatest depression the sites of the central chains of the Rockies were probably islands, but early in the period they may have been connected with the broad lands to the south and east. Thousands of feet of Carboniferous sediments were deposited where the Sierra Nevada Mountains now stand.
They are therefore not found, generally speaking, where the other deposits which we have considered, are forming, and, as these are always found near the coasts, it follows that the habitats of the creatures referred to must be far out at sea where no muddy sediments, borne by rivers, can reach them.
"I'se been a lookin' into dat," she said, cunningly; "I'se had dreams on dat ar'. Le'um see how de armies stand!" She brought from the house a cup of painted earthenware containing sediments of coffee. I saw her crafty white eyes look up to mine as she muttered some jargon, and pretended to read the arrangement of the grains.
The wide erosion surface which at the close of the Mesozoic lay near sea level where the Appalachian Mountains and their neighboring plateaus and uplands now stand was lowered gently along its seaward edge beneath the Tertiary Atlantic to receive a cover of its sediments. As the period progressed slight oscillations occurred from time to time.
Word Of The Day