Intersecting the mountains are numerous ravines and passes.
Verneau discovered in the ravines of Las Balos some genuine Libyan inscriptions.
The terrain was rough, covered with brush choked ravines and sharp granite bluffs.
The oak will not bear exposure to the full force of the sea gale, though in ravines and on sheltered slopes oak woods sometimes extend nearly to the shore.
The vegetation in the marshy bottoms of the ravines and in the valleys of the streams and rivers is totally different.
Five well-contrasted types of scenery in Derbyshire are clearly traceable to as many varieties of rock; the bleak dry uplands of the north and east, with deep-cut ravines and swift clear streams, are due to the great mass of Mountain Limestone; round the limestone boundary are the valleys with soft outlines in the Pendleside Shales; these are succeeded by the rugged moorlands, covered with heather and peat, which are due to the Millstone Grit series; eastward lies the Derbyshire Coalfield with its gently moulded grasscovered hills; southward is the more level tract of red Triassic rocks.
On either coast wild gorges and ravines, densely wooded, break the outline of the mountains.
The western portion is hilly, and intersected by ravines, and only the simplest kind of cultivation is possible.
Vineyards and sugar-cane yield crops in the warmer ravines; the sub-tropical valleys are famous for splendid crops of maize; wheat and barley thrive on the mountain slopes; arid at heights from 7000 to 13,000 ft.
Long from the Maranon to the Bolivian frontier, is naturally divided into two sections, the sub-tropical forests in the ravines and on the eastern slopes of the Andes, and the dense tropical forests in the Amazonian plain.
The numerous deep ravines which indented the des of the prehistoric volcano, and still form a marked feature I the outer slopes of Somma, have on the south side served channels to guide the currents of lava from the younger)ne.
The ground is broken up into picturesque gorges and deep ravines, and the whole is covered with fine forest trees and a rich undergrowth.
The former, occupied by the Ergeni hills, is deeply trenched by ravines and rises 300 and occasionally 630 ft.
In narrow ravines a bridge of one span may be rolled out, if the projecting end is supported on a temporary suspension cable anchored on each side.
These Bad Lands were once a fairly level plain, but intricate stream erosion produced the labyrinth of ravines and ridges for which the region is noted.
The picturesque effect of this sculpturing by water, wind and fire is greatly enhanced by the brilliant colours along the faces of the hills and ravines - grey, yellow, black and every shade of red and brown.
Cottonwoods flourish along the Little Missouri river, and in sheltered ravines grow stunted junipers and cedars, which seldom rise above the crest of some protecting bluff.
The faces of buttes and ravines that are turned toward the sun are usually devoid of vegetation.
The glaciers also attain a greater development in the western portion of the Nan-shan, but the valleys are dry, and the slopes of both the mountains and the valleys, furrowed by deep ravines, are devoid of vegetation.
The site of the greater part of the town consists of hills or bluffs separated by ravines and hollows, the elevation of the central portions being about 300 ft.
On the east and west the ravines already mentioned afforded, in the main, a sufficient protection, so that a massive wall was unnecessary, while near the south-eastern angle a breastwork was formed by the excavation of the natural rock, 2 which in later times was honeycombed with tombs.
On each side, about half-way between the keep and the sea, these ravines are crossed by massive bridges, and on the farther side of the westernmost of these, away from the city, a large tower and other fortifications remain.
They failed, however, in both attempts; and in the latter, owing to the darkness, and to the occurrence of a violent storm which suddenly swelled the torrents in the ravines, their force was thrown into inextricable confusion, and they were compelled to abandon their camp and make the best of their escape from the country.
Two rapid streams, Poesten Kill and Wynants Kill, flowing into the Hudson from the east, through deep ravines, furnish good water-power, which, with that furnished by the state dam across the Hudson here, is utilized for manufacturing purposes.
Only, but they are intersected with precipitous ravines 1500 ft.
The face is scored with ravines, a particularly deep cleft, known as The Gorge, affording the shortest means of access to the summit.
Russia witness the formation of numerous miniature canons, or ovraghi (deep ravines), the summits of which rapidly advance and ramify in the loose surface deposits.
The steppes proper are very fertile, elevated plains, slightly undulating, and intersected by numerous ravines which are dry in summer.
It occupies a picturesque site on the top of a hill, protected on two sides by deep ravines and steep slopes.
Another remarkable characteristic is found in the deep narrow ravines (caaple yta), bordered by precipitous cliffs, which traverse the mountainous districts; into some of these the daylight scarcely penetrates.
Along the eastern border of this delta, and southward of it, along the Mississippi itself, extends a belt of hills or bluffs (sometimes called "cane-hills"), which is cut by deep ravines and, though very narrow in the north, has in the south an average width of about to m.
That those to the westward have long been inactive is shown by the destruction of craters by denudation, by deep ravines, valleys and tall cliffs eroded on the mountain sides, especially on the windward side, by the depth of soil formed from the disintegrated rocks, and by the amount as well as variety of vegetable life.
Base of the mountain are numerous ravines (several hundred feet deep), to the bottom of which small streams of water fall in long cascades, but elsewhere on the eastern mountain there is little erosion or other mark of age.
Both the northern and southern slopes of this ridge are cut by ravines and gulches, and along the N.
In the ravines the eastern flora continues for some distance, and then disappearing gives place to that of the prairie, which is found everywhere between the Red river and the Rocky Mountains except in wooded and damp localities.
Many streams descend from the ravines only to wither away on the desert basin floors before uniting in a trunk river along the axis of a depression; others succeed in uniting in the winter season, when evaporation is much reduced, and then their trunk flows for a few score miles, only to disappear by sinking (evaporating) farther on.
The whole White Mountain region abounds in deep narrow valleys, romantic glens, ravines, flumes, waterfalls, brooks and lakes.
Fortification was well understood, as may still be seen in the remains of walled and escarped strongholds on hills and in steep ravines, while lagoon-cities like Mexico had the water approaches defended by fleets of boats and the causeways protected by towers and ditches; even after the town was entered, the pyramid-temples with their surrounding walls were forts capable of stubborn resistance.
Owing to the rugged character of the coast and its numerous ravines and caves the whole district was once infested with smugglers.
Moreover, the largest streams have numerous tributaries, and nearly all alike flow circuitously between steep if not vertical cliffs or in deep craggy ravines overlooked by distant hills, among which the wagon road has wound its way with difficulty.
The surface of the country is uneven and hilly, except in the north-east part, which forms an irregular plain cut up by ravines ' scooped out by torrents during the periodical rains.
The town is picturesquely situated on a narrow hill, surrounded by ravines, a narrow neck on the west alone connecting it with the surrounding country.