A green siliceous stone sprinkled with jasper, as if with blood, whence the name.
Portland and hydraulic cements are prepared by calcining siliceous limestones or a mixture of limestone and clay.
A green siliceous stone sprinkled with red jasper, whence the name.
The name alludes to the peculiar mixture of calcareous and siliceous characteristics in many of the beds.
Consisting of, or containing calcareous andsiliceous earths.
Even siliceous rocks, as we shall see further on, are transformed by it, forming when fused with it vitreous slags.
Lithium, Li, is, like potassium and sodium, somewhat widely spread in siliceous rocks, but only occurs in small quantities and as mere traces in considerable masses of potassium and sodium salts.
The Novo Urei meteorite was composed of siliceous matter and metallic iron (with nickel) like many other meteorites.
Thus we find occasionally that shingle and sand have been agglutinated firmly together by a ferruginous or siliceous cement, or that lime in solution has been introduced, so as to bind together materials previously incoherent.
He considers this, like the others, to be a thermal spring, having a narrow funnel-shaped tube in the upper part of its course, where the walls of the channel have become coated over with siliceous incrustations.
Virlet, is confirmed by the effect of heated gases which escape from rents in the isthmus of Corinth, and which have greatly altered and corroded the hard siliceous and jaspideous rocks.
The inside of the basin is whitish, consisting of a siliceous crust, and perfectly smooth, as are likewise two small channels on the sides of the mound, down which the water escapes when the bowl is filled to the margin.
The Great Geyser rises out of a spacious basin at the summit of a circular mound composed of siliceous incrustations deposited from the spray of its waters.
The name of a powder used for polishing metals and stones, first imported from Tripoli, which, as well as a certain kind of siliceous stone of the same name, has been lately found to be composed of the flinty cases of Infusoria.
Wood petrified by siliceous earth, and acquiring a structure similar to the simple mineral called opal.
They are, he says, in great part, of organic and freshwater origin, consisting of the siliceous cases of microscopic infusoria.
The rock is generally white; some parts of it are compact, and ring to the hammer; others are cellular, and with such cavities as are seen in the carious part of bone or the siliceous millstone of the Paris basin.
This fire-stone was not at first of a siliceous nature, like that used at present for striking fire, but a compact pyrites or marcasite, which was long distinguished by that name.
Plumbago, which is the substance here meant, when exposed to an open fire, is almost entirely consumed, leaving nothing but a little iron and siliceous earth.
I am not much inclined to believe in such effects of the shock of water against blocks of granite, and in the erosion of siliceous matter.
This fact confirms the connection which we find, notwithstanding the difference of fracture and of specific gravity between the saussurite and the siliceousbasis of the porphyrschiefer, which is the phonolite (klingstein).
Of siliceous limestone, at Pique, on the Great Miami; of sandstone at Creek Point, ten leagues from Chillakothe, where the wall is fifteen hundred toises long.
The fact is, that I have seen in sandstone the empty mould of marine shells with some siliceous crystallization, so far as I remember, which corresponded perfectly with that idea.
In the south of Scotland, there is a ridge of hills, which extends from the west side of the island in Galloway to the east side in Berwickshire, composed of granite, of schistus, and of siliceous strata.
Siliceous matter, physically speaking, is not soluble in water; that is to say, in no manner of way have we been enabled to learn, that water has the power of dissolving this matter.
This siliceous substance, viewed in one direction, or longitudinally, may be considered as columnar, prismatical, or continued in lines running nearly parallel.
But what I would here more particularly represent is, the transverse section of those longitudinal siliceous bodies These are seen in fig.
Many of these are filled with a siliceous crystallization, which evidently proceeds from the circumference towards the centre.
In accomplishing this latter operation the most melancholy accidents have occurred, in consequence of the iron rammer coming in contact with some siliceous substance, and thus striking fire.
Siliceous earth is not affected by the strongest heat, except by means of a burning lens, or dephlogisticated air.
With about equal weights of alkali and siliceous sand is made glass, of so great use in admitting light and excluding the weather from our houses, as well as for making various useful utensils.
Siliceous earth seems to be formed by nature from chalk, perhaps by the introduction of some unknown acid, which the vitriolic acid is not able to dislodge.
The cementing material may be siliceous or argillaceous, and is sometimes calcareous.
Mr. Darwin collected some masses of tufa which were found to be mainly organic, containing, besides remains of fresh-water infusoria, the siliceous tissue of plants!
Siliceous Pebbles from the Geyser of the Yellowstone Canyon.
The percolation of siliceous waters gradually turned the arboreal vegetation into stone by the process of substitution, and thus preserved in these silent monuments a record of the events which once transpired there.
It is a broad, circular table about two feet high, composed entirely of hard siliceous deposit.
He says: "Imagine the case of a simple thermal siliceous spring, whose waters trickle down a gentle incline; the water thus exposed evaporates speedily, and silica is deposited.
The pure siliceous skeletons of the Polycystina were first recognised in 1833 by Ehrenberg in chalky marls (L.
The indigestible constituents (siliceous shells of Diatoms and Tintinnoidea, calcareous shells of small Monothalamia and Polythalamia, &c.
The pure Radiolarian rocks consist for the greater part (usually much more than half, sometimes even more than three-quarters) of closely compacted often calcined masses of siliceous Polycystine shells.
Brandt concluded, from the varying size of the median bars in the twin-spicules of Sphaerozoum, that these siliceous structures grow by intussusception (L.
The spongy framework exhibits in all these Spongodiscida no remarkable differences, being everywhere composed of fine branched solid siliceous threads, interwoven in all directions, with irregular meshes of very different size.
The siliceous latticed shell, in which the central capsule is enclosed, represents a simple regular sphere, with simple cavity.
I here confine the genus Thalassosphaera to those solitary #Beloidea# in which the body exhibits no alveoles, and the siliceous solid spicula in the calymma are quite simple needles.
Siliceous lavas, on the other hand, are, when consolidated, relatively light both in color and weight and melt at relatively high temperatures.
On the other hand, basaltic lavas may be extruded at unusually low temperatures, in which case their behavior may resemble that of the normal siliceous lavas.
It must not, however, be assumed that the temperature of lava is always the same when it arrives at the surface, and hence it may happen that a siliceous lava is exuded at so high a temperature that it behaves like a normal basaltic lava.
Cone of siliceoussinter built up about the mouth of the Lone Star Geyser in the Yellowstone National Park.
No igneous rock type is known which could be formed by the fusion of any of the carbonate rocks such as limestone or dolomite, or of the more siliceous rocks, such as sandstone or quartzite.
Broken apart, each grain reveals in its center a core of siliceous sand about which carbonate of lime has been deposited in concentric layers.
Most so-called limestones have a large admixture of argillaceous materials (clays) and of siliceousor sandy particles.
Rhyolite is a very siliceous lava containing rather more silica than granite, to which of the intrusive rocks it is most closely related, and from which it differs in its texture and in the manner of its occurrence in nature.
Formation of Travertine andSiliceous Sinter by the Vegetation of Hot Springs, 9th Ann.
The rock is less siliceous than rhyolite, contains no quartz crystals, and approaches a feldspar in its average composition.
Eruptions of such lava are for this reason without the violent aspects which belong to extrusions of more siliceous (more “acidic”) lavas.
Geysers are known only from areas of siliceous volcanic lava, and this may perhaps have its cause in the easier solution of the geyser tube from such materials.
Whenever the contained water passes off from siliceous lavas without violent explosions, the lava may flow from the vent, but in contrast to basaltic lavas it travels a short distance only before consolidating.
The surface, to the depth of two or three feet, is a dark coloured vegetable mould intermixed with argillaceous loam, and still deeper, with a fine siliceous sand.
One is Sponge, the most common kinds of which are composed of skeletons of siliceous spicula; and these can be discerned with the microscope in the interior of the chalk-flints.
Crystals of sulphate of copper are placed at the bottom of the outer cell, into which water is poured; and the inner cell, into which the zinc plate goes, is filled with siliceous sand.
Basalt is less siliceousthan granite and rhyolite, and contains much more iron, calcium, and magnesium.
The microscopic plants which formsiliceous shells, called diatoms, make extensive deposits in some places.
Tripolite, fine-grained, chalklike in appearance, consisting of tiny siliceous shells of very simple plants called diatoms.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "siliceous" in a variety of sentences. We hope that you will now be able to make sentences using this word.
