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For several centuries also Chinese settlers have been attracted to the south-western district by the gold which they found in the river gravel and alluvium. These also have intermarried with the people of the country; but they have retained their national characteristics, and have been continually recruited by considerable numbers of their fellow countrymen.
The word originally came into use to describe that part of the alluvium accumulated by the Nile near its mouth, which forms a fertile territory shaped somewhat like the fourth letter of the Greek alphabet.
Reaching on the north to the thirty-eighth and on the south to the thirty-fourth parallel, she had a length diagonally from Diarbekr to the alluvium of 350 miles, and a breadth between the Euphrates and Mount Zagros varying from about 300 to 170 miles. Her area was probably not less than 75,000 square miles, which is more than double that of Portugal, and not much below that of Great Britain.
It consists of a broad tract of fertile alluvium, intervening between the Tigris and the mountains, well watered by numerous large streams, which are capable of giving an abundant irrigation to the whole of the low region.
Pilgrim's Creek was not what is known as "a poor man's diggings." Here and there, especially on the terraces or beds of wash lying above the water flow, lay a few claims which were comparatively easy to work. But most of the alluvium in and about the bed of the creek ran deep, often from ten to twenty feet.
At times, when the water is very high, the current will cut a new route across the low isthmus, or neck, of a peninsula, around which sweeps a long reach of the main channel, leaving the tortuous bend which it has deserted to be gradually filled up with snags, deposits of alluvium, and finally to be carpeted with a vegetable growth.
If it is certain that the alluvium of the Mesopotamian plain has been brought down by the Tigris and the Euphrates, then it is no less certain that the physical structure of the whole valley has persisted, without material modification, for many thousand years before the date assigned to the flood.
In about four miles we overtook the gunboat fleet just as it was emerging into Deer Creek. Along Deer Creek the alluvium was higher, and there was a large cotton-plantation belonging to a Mr. Hill, who was absent, and the negroes were in charge of the place.
The alluvium on the cols or watersheds, before alluded to, is such as would have been formed if the waters of the rivers had been made to flow east, or out of the upper ends of the supposed glacier-lakes, instead of escaping at the lower ends, in a westerly direction, where the great blockages of ice are assumed to have occurred. In addition to these arguments of Mr.
All this alluvium was evidently of fluviatile origin, for, in the interstices between the pebbles, the Ancylus fluviatilis and other freshwater shells were abundant.
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