Despite its distinct plateau character, Podolia is by no means lacking in beautiful landscapes. The northern, steep, border of the Plateau occasionally rises for 200 m. above the swampy Buh plain, and its height above sea level is in some places 470 m. The whitish-gray chalk-marl which forms the basis of this land grade glitters from a distance, exposed thru the action of the water, which flows down the steep side. The miocene sandstone lying above shows fantastic rock piles and ravines. Beautiful beech forests are to a great extent still maintaining themselves [[40]]on the steep edge. From a distance, everything produces the illusion of a high forest-covered chain of hills. On climbing it, however, we see in the south only an unbounded lightly undulating elevated plain, with flat valleys filling the entire view.
Toward the southwest, too, Podolia declines with a similar steep border, but this one is neither so uniform nor so high and picturesque. These steep borders owe their origin to a recent uprising, which has affected the Podolian Plateau, especially in the west, since the glacial period. To the same cause the picturesque, beautifully wooded, eroded hill-country of the Opilye owes its origin, a section which extends southeast from Lemberg in the regions of Rohatin and Berezani to the Dniester, and which, with its peaks, reaches a height of 440 m. Most remarkable, however, is the long chain of rocky hills which extends from Brody to the southeast toward Kamenetz Podilski. This chain of hills, which bears the name of Toutri, is marked on all maps by the wilfully chosen name of Medobori. The limestone rock, which contains a great amount of fossils, forms fantastic crags on the more than 400 m. peaks of the hill-chain, which look down upon the land like old fortresses. The entire chain of hills is a new-tertiary coral and briozone reef which, after the withdrawal of the sea, remained behind as a long rock dyke.
Beyond this hilly region the entire Podolian Plateau has a flat, undulating surface. Beginning as far back as the upper Sereth and Sbruch we find typical steppe-plains. The farther southwest, the more flat, undulating and steppe-like sections do we meet, until finally the Podolian elevation gradually merges in the Pontian steppe-plain.
Much variety and beauty is given to the appearance of the Podolian landscape by the valleys of the Dniester tributaries on the left. In their upper parts they are wide and have flat, swampy ground, many ponds and bogs [[41]]and gentle valley declines. In its further course the river begins to cut in more and more deeply, the valley becomes constantly narrower and deeper and winds on in regular bends, the valley-sides become higher and steeper, bare walls of rock take the place of the soft green slopes. We are in a Podolian “yar,” in a miniature cañon.
In the sides of the yars the geologic history of the Podolia is engraved in imperishable letters. The river has sawed the plateau thru as tho with a gigantic saw, and has exposed the various layers of stone. As a rule they lie nearly horizontally above one another.
The oldest rock species of Podolia are the granite-gneisses, which were folded and disturbed in pre-cambrian times. The lines of the folds and breaks stretch principally north to south. Granite composes the rocks of the Dniester rapids near Yampol and the numerous rapids of the Boh River, in whose rocky vale this primitive rock formation appears distinctively. On the granite base, almost horizontally, slightly turned toward the southwest, lie dark slate and limestone, upper silurian at first in West Podolia, then the devonic layers, of which the old red sandstone attracts the eye most of all, because of the dark red coloring which it gives to the steep walls of the Podolian cañons. These are followed by chalk layers, and, last of all, by recent tertiary formation whose gypsums form picturesque groups of rocks on the heights of the Yari walls. In the mighty gypsum stores of Podolia may be found many a large, beautiful cave, with wonderful alabaster stalactites.
All tributaries on the left side of the Dniester, beginning at the Zolota Lipa, flow into yari-cañons of this sort. The most beautiful and magnificent is the cañon of the Dniester, whose walls often exceed a height of 200 m. It cuts thru the high plateau in adventurous windings, every curve revealing new, beautiful prospects over the high, concave, steep edge, torn by ravines, and the gently rising [[42]]convex banks. In deep gorges the yari of the tributaries open into the yar of the main stream. Between the defiles stretches the flat, hardly undulating plain. In the summer only endless waving grain-steppes present themselves to the view of the traveler, only here and there a little wood appears on the horizon, or a lone farm. Suddenly the wood seems to end, the traveler is confronted by a deep, steppe-walled valley, down the sides of which climbs the road. And below, on the silvery river, amid the green of the orchards, lies village after village.
The further to the east, the more frequent do the yari become, and the balkas (gorges) similar to them but smaller; yet these are not so deep and picturesque. In the regions of Tiraspol Ananiv the entire plateau surface is very profusely cut by these defiles. In the district of Ananiv the balkas take up one-seventh of the entire surface. The plateau is cut up by these water crevasses into innumerable narrow fens.
The balka, like the yar, owes its existence to the erosive activity of flowing waters. On the Dniester we see, on both sides of its deep yars, great masses of old river boulders, which lie on the summit of the plateau beneath the thick cover of loam. They are boulder deposits of the pre-glacial Dniester. Later, when the recent raising of the Ukrainian plateau group began, and it occurred with particular force in the Podolian Plateau, the rivers cut in, and in the course of thousands of years formed their present picturesque defiles.
The entire surface of the Podolian Plateau is covered with a thick mantle of loess, which was formed in the desert and steppe period following the glacial age. In the manner in which the loess is heaped up, in the symmetry of the river valleys, whose western declivities are regularly steeper, in the general arrangement and formation of the valleys of Podolia, the great influence of winds may be distinctly recognized. [[43]]