But in more strongly, closely folded rocks the ridges and valleys are determined chiefly by the outcrops of harder and softer strata, as shown in Fig.
The chief interest of either class consists in their effect upon the outcrops of the faulted strata, after erosion has removed the escarpment produced by the dislocation.
The outcrops of vertical strata, dikes, or veins, on the other hand, are represented by straight lines and bands on the map.
While theoutcrops of inclined strata are deflected to the right or left in crossing ridges and valleys, according to the direction and amount of their inclination.
The settlement lay at the foot of small, well-wooded granitic hills, even prettier than the outcrops of Unyamuezi, and was intersected by clear streams.
Stringers which in their outcrops bear metals, often disappoint miners, no metal being found in depth.
Below the higher slopes the valleys deepen into gorges, and these broaden out in the soft tufa and are lost at the cross-streams of lava or the outcrops of the granite.
But the chief freight was lime from La Bajada, which was burned in the kilns on the Barranca, at the outcrops of the beds of conchiferous limestone.
The granite which outcrops at Martin Garcia also forms the platform of the English Bank in the outer harbour.
Winter and summer they remain within range of a few poor springs, which are caused by various outcrops of lava of limited extent; and they leave these, and wander over the tableland, only in the rainy season.
Two limestone outcrops follow the contours about five and 20 feet below the tops of the hills.
Hilltop rock outcrops on the area provide excellent protection for the cottontail especially from low temperatures and freezing rain or blowing snow.
When theoutcrops were first worked in the central section, it was believed that there was little or no gold in the lower levels.
The outcrops of ore and limestone lie high on a mountain, which I named Mount Logan, in honor of General T.
All the outcrops are within 1,500 feet horizontal distance.
The top of the outcrops above sea-level are as follows: FEET.
Also undeveloped outcrops of soft coal at numerous points on the same river.
The Snoqualmie Coal Group outcrops some hundreds of feet up the west side of Snoqualmie Mountain, and about three miles southwest of Hop Ranch.
The highest outcrops are those of the lowest seams geologically.
The outcrops begin near the level of the valley, and continue in a series to an altitude of 550 feet above the valley.
Limonite occurs at the surface also, having been deposited in cavities and as a cement for loose fragments, particularly on the weathered outcrops of formations rich in iron.
At the same time lateral branches were developed which followed the outcrops of the less resistant beds and eroded them away so as to leave the hard beds in bold relief.
In studying now a few outcrops and quarries we shall learn a little of some common rocks and how they weather away.
When derived in part from coaly shales, as over many outcrops of the Pennsylvanian, it may when moist be almost black.
The aquifer dips toward the region of the wells from higher ground, where it outcrops and receives its water.
In many quarries and outcrops we may see that the blocks into which one or more of the uppermost layers have been broken along their joints and bedding planes are no longer angular, as are those of the layers below.
Here, on either side of the valley V, we find outcrops of layers tilted at high angles.
Again, we see in the above, outcrops of the strong pubescent instinct to enlarge the vocabulary in two ways.
The sandy and stony maritime region, the foot-hills of the Gháts, granites and traps with large veins and outcrops of quartz; and Wadys lined with thick beds of conglomerate.
Here large outcrops of quartz mingled with the clay slate.
The taste is astringent, probably from the alumina; and it is based upon outcrops of a sandy calcaire apparently fit for hydraulic cement.
That quartzite underlies the sandstone of the plain is indicated by the occasional outcrops of the former rock on the plain, and from the fact that borings for deep wells have sometimes reached it where it is not exposed.
Where harder beds alternate with softer, the former finally come to stand out as ridges, while the outcrops of the latter mark the sites of the valleys.
The areas of softer rock would be brought low, and the outcrops of hard rock (Plate XV) would constitute ridges during the later stages of an erosion cycle.
The quartzite, on the other hand, is the formation of the ridges, though it outcrops at a few points in the plain.
The flint-bearing stratum of the Harrison County aboriginal quarries outcrops a short distance away and appears at several points within the cave.
For the rest it is a bare road, with outcrops of coal appearing here and there, and the infant Vaal to be crossed, a very mean and muddy little stream.
The materials are lost, and all we possess are fleeting glimpses, outcrops of fact on the wide plains of tradition, random guesses, stray relics which suggest without enlightening.
Wilde was of opinion that the island was rich in minerals, traces of both iron and coal having been met with, while outcrops of granite and a very beautiful marble, probably exceedingly rich in lime, had also been encountered.
In an open country the prospector should keep to the hill tops if on the lookout for veins, as the outcrops show more distinctly on the bare ridges, but alluvial deposits are only found in valleys and along the borders of streams.
A great mineral country is usually marked by the outcrops of the veins being persistent in their courses and traceable for many miles, though very probably many breaks may occur in these outcrops.
And underfoot, between the outcrops of rock, were here and there patches of ivory-yellow reindeer moss.
We frequently had to climb round their sides at the foot of steep, smooth cliffs of sandstone, and then again to scramble over hard outcrops of the same rock on the dry ground beyond.
Although iron ore of the best quality outcrops in many places on the estates once devoted to coffee on the southern slope of the coast range, it was not until the year 1881 that the first claim was located, or "denounced.
The ore outcrops on the sidehills, and the mining is in the nature of quarrying.
More than ninety per cent of the rats that were recorded as associated with the outcrops were at the hilltop stratum.
Although rock outcrops situated in areas of uniform habitat have not been observed to the extent that hedge rows have, a similar spacing seems to exist and the sites available for houses always exceed the actual number found.
Although this snake occurs in every habitat of the Reservation, it has been found most often along rock outcrops of wooded hilltop edges in the type of habitat most favored by the rat.
Here frequent outcrops of sandstone and quartz were noticeable to the engineers, whose professional enthusiasm was excited at seeing before them the materials for building a permanent fort in the district.
The northern portion is situated on the opposite side of a deep canyon or ravine, on the crown of a hill composed of limestone, which outcrops everywhere about it, and is considerably higher than the small cluster on the south.
At many points throughout this region there are outcrops of a calcareous sandstone, very soft and strongly laminated and therefore easily excavated.
They are invariably situated on low surface outcrops of 'desert sandstone, surrounded by mulga and grass; beyond that, sand.
Should they see hills of ironstone and diorite, or blows and outcrops of quartz, they will certainly revisit the locality.
On the 25th a sudden change took place, and we found ourselves in a small, open thicket with a coarse undergrowth of grass, and scattered about were a few boulders of decomposed granite and occasional low outcrops of rock.
On the plain to the south are one or two small outcrops of ironstone and quartz, sticking up out of the sand, as if some hills other than sandstone had existed, and become buried by the all-spreading sand.
It was strewn with massy boulders and bare outcrops of rock, while the pines which managed to find a foothold here and there glittered with frost crystals every morning.
The hills, instead of being, as on the great plateau we had recently left, outcrops of granite, were composed of argillaceous sandstone.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "outcrops" in a variety of sentences. We hope that you will now be able to make sentences using this word.
