The picturesque Bureya Mountains above the Amur, the forest-clad Sikhota-alin on the Pacific, and the volcanic chains of Kamchatka belong, however, to quite another orographical construction, being the border-ridges of the terraces by which the great plateau formation descends to the depths of the Pacific Ocean.
The double river-systems of the Volga and Kama, the Ob and Irtysh, the Angara and Yenisei, the Lena and Vitim on the Arctic slope, and the Amur and Sungari on the Pacific slope, are instances.
The most important of the new railways is the Siberian, of which the first section, Chelyabinsk to Omsk, was opened in December 1895, and which, except for a short section round Lake Baikal, in 1901 was completed right through to Stryetensk, on the Shilka, the head of navigation on the Shilka and the Amur, 2710 m.
At the Pacific end of the Siberian railway a line connecting Vladivostok with Khabarovsk (479 m.) at the junction of the Amur and the Usuri, was first of all built, following the valley of the Usuri.
But it was soon found that the cost of the section required to complete the railway between Stryetensk and Khabarovsk, along the Shilka (246 m.) and the Amur (1160 m.), would be enormous, while neither the wild mountainous tracts of the lower Shilka and upper Amur, nor the marshy, often inundated region between Khabarovsk and the Little Khingan mountains, could ever be the seat of a numerous population.
Across the desert to Charjui, on the Amur river, Bokhara and the Russian fort Katta-kurgan, and then to Samarkand, Kokand and Andijan in Ferghana, 710 m.
By the treaty of Aigun (May 28, 1858), and without any military operations, the cession of a great part of the basin of the Amur was obtained from China.
2 Besides this, the Duma had passed before its adjournment on the 28th of October 1908 much useful legislation, some 300 bills in all, including two for the building of important railways on the Amur and in Siberia.
AMUR (known also as the Sakhalin-ula), a river of eastern Asia, formed by the confluence of the Argun and the Shilka, at Ust-Stryelka, in 53° 19' N.
The Amur proper flows at first in a south-easterly direction for about Boo m., as far as long.
132' E., separating Manchuria from the Amur government; it then turns to the north-east, cuts its way through the Little Khingan mountains in a gorge 2000 ft.
Its principal tributaries from the south are the Sungari, which the Chinese consider to be the true head-river of the Amur, and the Usuri; from the north it receives the Oldoi, Zeya, Bureya, Kur, Gorin and Amgun.
1876); and GrumGrshimaylo, Account of the Amur (Russian, 1894).
South of this enclosed depression is another great hydrographic barrier which parts it from the low plains of the Amur, of China, Siam and India, bordered by the shallows of the Yellow Sea and the shoals which enclose the islands of Japan and Formosa, all of them once an integral part of the continent.
Starting from the Amur river and reaching along the eastern margin of the Gobi desert towards the sources of the Hwangho, it merges into the Altyn-tagh and the Kuen-lun, forming the northern face of the vast Tibetan highlands which are bounded on the south by the Himalaya.
The Pamir highlands between the base of the Tian-shan mountains and the eastern buttresses of the Hindu Kush unite these two great divides, enclosing the Gobi depression on the west; and they would again be united on the east but for the transverse valley of the Amur, which parts the Khingan mountains from the Yablonoi system to the east of Lake Baikal.
On the east and south the Amur embraces no less than 776,000 sq.
Range, continuing in the same direction, divides the waters of the river Lena, which flows through Siberia into the Arctic Sea, from those of the river Amur, which falls into the North Pacific; the basin of this river, with its affluents, constitutes Manchuria.
From the north of Manchuria the Khingan range stretches southward to the Chinese frontier near Peking, east of which the drainage falls into the Amur and the Yellow Sea, while to the west is an almost rainless region, the inclination of which is towards the central area of the continent, Mongolia.
It then deflects south-east till it touches the Kerulen affluent of the Amur river at a point which is shown in unofficial maps as about 117° 30' E.
South of the Amur bay, at the head of which lies the Russian port of Vladivostok.
From the Khingan ranges to the Pacific, south of the Amur, stretch the rich districts of Manchuria, a province which connects Russia with the Korea by a series of valleys formed by the Sungari and its affluents - a land of hill and plain, forest and swamp, possessing a delightful climate, and vast undeveloped agricultural resources.
And between 116° and 134° E., and is wedged in between China and Mongolia on the west and north-west, and Korea and the Russian territory on the Amur on the east and north.
By the Amur, E.
By the Amur, on the S.
Gold mines are worked at several places in the northern part of Manchuria, of which the principal are on the Muho river, an affluent of the Amur, and near the Russian frontier.
The Saharan Atlas is essentially one chain, though known under different names: Jebel K'sur and Jebel Amur on the west, and Jebel Aures in the east.
The Jebel Amur was traversed by the column which seized El Aghuat in 1852, and from that time dates the survey of the mountains.
Corner of Transbaikalia, and then along the rivers Argun, Amur and Usuri to the frontier of Korea.
The orography of the Aldan region is little known; but travellers who journey from the Aldan (tributary of the Lena) to the Amur or to the Sea of Okhotsk have to cross the same plateau and its border-range.
A typical feature of the north-eastern border of the high plateau is a succession of broad longitudinal 5 valleys along its outer base, ' The wide area between the middle Lena and the Amur, as well as the hilly tracts west of Lake Baikal, and the Yeniseisk mining region are in this condition.
The south-eastern slope of the great plateau of Asia cannot properly be reckoned to Siberia, although parts of the province of Amur and the Maritime Province are situated on it; - they have quite a different character, climate and vege- eastern, tation, and ought properly to be reckoned to the Manslope of, churian region.
Between the Nonni 'and the Sungari, and the rich plains of the Bureya and Silinji in the Amur province belong to this belt, 400 m.
The lower Amur occupies the northern part of this broad valley.
Gold is found on the high plateau in the basin of the upper Vitim, on the lower plateau in the Nerchinsk district, and on the upper tributaries of the Amur (especially the Oldoi) and the Zeya, in the north-east continuation of the Nerchinsk Mountains.
The gold-bearing gravels of East Siberia, especially those of the Lena and the Amur, are relatively more prolific than those of West Siberia.
The total yield annually amounts to some 700,000 oz., the largest quantity coming from the Olekminsk, district in the province of Yakutsk, and this district is followed by the Amur region, the Maritime province, and Nerchinsk and Transbaikalia.
The Amur, the upper tributaries of which rise on the eastern border-range of the high plateau, is similar.
The Shilka and the Argun, which form it, flow first towards the north-east along the windings of the lower terrace of the great plateau; from this the Amur descends, cutting through the Great Khingan and flowing down the terraces of the eastern versant towards the Pacific. A noteworthy feature of the principal Siberian rivers is that each is formed by the confluence of a pair of rivers.
Examples are the Ob and the Irtysh, the Yenisei and the Angara (itself a double river formed by the Angara and the Lower Tunguzka), the Lena and the Vitim, the Argun and the Shilka, while the Amur in its turn receives a tributary as large as itself - the Sungari.
Owing to the fact that the great plateau separates the Lena from the Amur, no easy water communication can be established between the latter and the other Siberian rivers.
The tributaries of the Amur (the Shilka with its affluent the Ingoda) become navigable only on the lower terrace of the plateau.
In the basin of the Amur are Lake Hanka (1700 sq.
M.), connected with the Usuri; Lakes Kada and Kidzi, by which the lower Amur once flowed to the Pacific; and very many smaller ones on the left side of the lower Amur.
Are not uncommon at Krasnoyarsk, Irkutsk and Nerchinsk; even in the warmer southern regions of West Siberia and of the Amur the average winter temperature is 2.4° F.
At Urga in Mongolia, turning north in the Amur region and reaching the Pacific at Nikolayevsk.
End of Lake Baikal, then it broadens out so as to include the whole of the Amur basin, the total summer precipitation there being about 12 in.
Farther east, in the Amur region, a great number of new species of European According to A.
The Amur region shares the characteristics of the north Chinese fauna.
Macrotus), Syphneus aspalax and the alpine Lagomys from the Central Asian plateaus; while the tiger makes incursions not only into the Amur region but occasionally as far as Lake Baikal.