Taking their origin from a series of lacustrine basins scattered over the plateaus and differing slightly in elevation, the Russian rivers describe immense curves before reaching the sea, and flow with a very gentle gradient, while numerous large tributaries collect their waters from over vast areas.
There are wide areas on the plains of West Siberia and on the high plateau of East Siberia, which, virtually, are still passing through the Lacustrine period; but the total area now under water bears but a trifling proportion to the vast surface .which the lakes covered even at a very recent period, when Neolithic man inhabited Siberia.
Siberia, of lacustrine regions in N.W.
Below the Bio-Bio river there is a line of large picturesque lakes extending from the province of Cautin, south through that of Llanquihue, corresponding in character and position to the dry lacustrine depressions extending northward in the same valley.
It contains land shells, and hence cannot be attributed to marine or lacustrine submergence.
The great lacustrine depression of the middle Volga was thus reached; and when the Mongol invasion of 1239-42 came, it encountered in the Oka basin a dense agricultural population with many fortified and wealthy towns - a population which the Mongols found they could conquer, indeed, but were unable to drive before them as they had done so many of the Turkish tribes.
The most densely peopled region and the focus of civilization is the lacustrine depression and the surrounding uplands.
Wood-Martin, The Lake-Dwellings of Ireland, or Ancient Lacustrine Habitations of Erin, commonly called Crannogs (Dublin, 1886); Sir W.
In the great lacustrine depression of Nicaragua is collected all the drainage from the eastern versant of the volcanic mountains, from the sheer western escarpment of the main cordillera, and from a large area of northern Costa Rica.
To the lacustrine region of Finland and N.W.