The character of the soil changes from the alluvial lowlands.
Long, formed by alluvial deposits during the last fifteen centuries.
Towards the city the red soil is intersected by creeks and morasses, whose margins yield crops of rice, mustard and til seed; while to the east of the town, a broad, alluvial, well-cultivated plain reaches as far as the junction of the Dhaleswari and Lakshmia rivers.
In physical character Cambay is entirely an alluvial plain.
In the valleys also are strips covered with a fertile alluvial deposit.
The valley bed is more or less covered with alluvial soil, and cultivated in places by artificial irrigation.
And 116° 29' E., on the northern extremity of the great alluvial delta which extends southward from its walls for 700 m.
The prevailing soils are sand and gravel loams, but other varieties are numerous, ranging from rich alluvial beds of extinct lakes, as in parts of Lyon and Esmeralda counties, to the strongly alkaline plains of the southern deserts.
The population is small, rude and uncivilized; and the surface is rough and mountainous and generally covered with forest except near the coast, to the alluvial lands on which settlers have been attracted from various surrounding countries.
And had a population in 1901 of 300,173; it consists partly of fertile valleys formed by spurs of mountain system which divides it from Siam, and partly of a rich alluvial tract created by the great rivers which issue from them.
The substratum of the plain is a bed of boulders, covered during the lapse of ages by a deposit of rich alluvial soil.
The delta soil is typically a heavy, black, alluvial clay, very fertile, but difficult to work; admixture of sand is beneficial, and the localities where this occurs yield the best cotton.
It contains all the best land in Berar; it is full of deep, rich, black alluvial soil, of almost inexhaustible fertility, and it undulates sufficiently to maintain a natural system of drainage, but there is nothing picturesque about this broad strip of champaign country.
Most of its alluvial burden being deposited in the lakes, the Neva takes a long time to alter its channels or extend its delta.
Of Lake Pontchartrain, between the alluvial lands and the pine hills, and, in the S.E.
At this point, three-fourths of which is a comparatively level alluvial plain, and the remainder an arid plateau broken by mountain ranges.
The soil, chiefly alluvial, though in some places arenaceous, is generally fertile and well cultivated, but a great portion is covered with forests, interspersed with lakes.
No evidences of recent lava flows can be found in the interior over the great alluvial plain, the Lower, or the Higher Steppes.
This underground network of old river-beds underlying the great alluvial plains must be filled to repletion before flood waters will flow over the surface.
Gold is obtained chiefly from quartz reefs, but there are still some important alluvial deposits being worked.
A considerable number of men are engaged in the various states on alluvial fields, in hydraulic sluicing, and dredging is now adopted for the winning of gold in river deposits.
Iridosmine occurs commonly with gold or tin in alluvial drifts.
The Chinese difficulty, so far as the mining population was concerned, was solved by the exhaustion of the extensive alluvial deposits; the miners' prejudice against the race, however, still exists, though they are no longer serious competitors, and the laws of some of the states forbid any Chinese to engage in mining without the express authority in writing of the minister of mines.
As stream tin it occurs abundantly in some of the alluvial deposits derived from the crystalline area, especially on the west coast.
Since 1890 the tin produced from these alluvial beds has supplied between 50% and 75% of the tin of the world.
The tract adjoining this long line of lagoons is, like the basin of the Po, a broad expanse of perfectly level alluvial plain, extending from the Adige eastwards to the Carnic Alps, where they approach close to the Adriatic between Aquileia and Trieste, and northwards to the foot of the great chain, which here sweeps round in a semicircle from the neighborhood of Vicenza to that of Aquileia.
The lakes of Bolsena (Vulsiniensis), of Bracciano (Sabatinus), of Vico (Ciminus), of Albano (Albanus), of Nemi (Nemorensis), and other smaller lakes belong to this district; while between its south-west extremity and Monte Circello the Pontine Marshes form a broad strip of alluvial soil infested by malaria.
The action of rain, ice and rivers conspires with the movement of land waste to strip the layer of soil from steep slopes as rapidly as it forms, and to cause it to accumulate on the flat valley bottoms, on the graceful flattened cones of alluvial fans at the outlet of the gorges of tributaries, or in the smoothly-spread surface of alluvial plains.
Hit stands almost at the head of the alluvial deposit, about 550 m.
The land itself, an alluvial deposit, is very fruitful.
The plains are covered by a formation similar to that of the Argentine pampas and by the alluvial deposits of the present rivers.
Next, the long and narrow valley of the Nerbudda from Jubbulpore to Hoshangabad is formed of deep alluvial deposits of extreme richness and excellently suited to the growth of wheat.
They may be divided into three classes: the pine lands, which often have a surface of dark vegetable mould, under which is a sandy loam resting on a substratum of clay, marl or limestone - areas of such soil are found throughout the state; the " hammocks," which have soil of similar ingredients and are interspersed with the pine lands - large areas of this soil occur in Levy, Alachua, Citrus, Hernando, Pasco, Gadsden, Leon, Madison, Jefferson and Jackson counties; and the alluvial swamp lands, chiefly in E.
The soil is composed of red ferruginous kankar, with a stratum of clay in the more elevated parts, covered by a thin layer of vegetable mould, or by recent alluvial deposits.
On rich loams and the alluvial soils of river-valleys, when well drained, the tree attains a large size, often rivalling the giant oaks of Europe; trunks of 3 or 4 ft.
The descent from the summits of the range into the plain is somewhat less abrupt on the western than it is on the eastern side, and between the foot of the mountains and the Strait of Malacca the largest known alluvial deposits of tin are situated.
As the general level of the country is raised by successive alluvial deposits, the more ancient river-beds become buried, but being still connected with the newer rivers at some point or other, they continue to absorb water.