Jack as being overspread by coral and large shells of the Chama (Tridacna) gigas, which rest on quartzose and arenaceous rocks, at various levels from the sea-coast to the summit of the highest hills.
At Hunstanton, on the north, the undermining of the lower arenaceous beds at the foot of the cliff, causes masses of red and white chalk to be precipitated from above.
Large masses, also, are continually taken up of an arenaceous rock, cemented by calcareous matter, including multitudes of broken shells of recent species.
It appears that the numerous caverns of the Morea occur in a compact limestone, of the age of the English chalk, immediately below which arearenaceous strata referred to the period of our greensand.
But in Yorkshire this calcareo- arenaceous formation thickens to about 30 feet, and constitutes the lower part of the Middle Oolite, extending inland from Scarborough in a southerly direction.
The arenaceous division, the marls, and the limestone may all be seen in some places to alternate with each other; yet it can by no means be affirmed that there is no order of arrangement.
The arenaceous laminae are much hardened at the point of contact, and the clays are converted into siliceous schist.
Casts of rain-prints on a portion of the same slab (Figure 444), seen to project on the under side of an incumbent layer of arenaceous shale.
The calcareous and the arenaceous rocks of Russia above alluded to alternate in such a manner as to leave no doubt of their having been deposited in different parts of the same great period.
The loftiest of the Cyclopean islets, or rather rocks, is about 200 feet in height, the summit being formed of a mass of stratified clay, the laminae of which are occasionally subdivided by thin arenaceous layers.
Before a part of the immense plains of America was geologically examined, it might have been supposed that their uniform and continued horizontality was caused by alluvial soils, or at least by arenaceous tertiary strata.
The muschelkalk is almost a lias with encrinites; and quadersandstein (for there are doubtless many above the lias or limestone with gryphites) seems to me to represent the arenaceous layers of the lower shelves of Jura limestone.
It is not easy, when several formations are not perfectly developed, to determine the age ofarenaceous rocks.
Is it an arenaceous rock analogous to green sandstone, or does it belong to the sandstone of Cocollar?
I have not given the name formation either to the sandstone of the Orinoco, of Cocollar, of Bergantin or to the gypsum of the Llanos, because nothing as yet proves the independence of those arenaceous and gypsous soils.
The arenaceous deposits of the series, namely, resemble those of the Permian, not only in being commonly red or variegated in their colour, but also in their conspicuous paucity of organic remains.
The Upper Lias (Terrain Toarcien of D'Orbigny) attains a thickness of 300 feet, and consists principally of shales below, passing upwards into arenaceous strata.
Taken as a whole, the Cambrian formation is essentially composed of arenaceous and muddy sediments, the latter being sometimes red, but more commonly nearly black in colour.
The base of the Upper Silurian series is constituted by a series of arenaceous beds, to which the name of "May Hill Sandstone" was applied by Sedgwick.
In Scotland the "Old Red" forms a great series ofarenaceous and conglomeratic strata, attaining a thickness of many thousands of feet, and divisible into three groups.
The highest beds of the Carboniferous Limestone series are succeeded, generally with perfect conformity, by a series of arenaceous beds, usually known as the Millstone Grit.
Slice of arenaceous and oolitic limestone from the Carboniferous series of Shap, Westmoreland; magnified.
Cornstone is a limestone containing a large quantity of arenaceous matter or sand.
But there are other reasons for the comparative paucity of fossils in arenaceous strata, as we shall see presently.
The thickest deposits of this rock consist of clay and sand, alternating with marl and arenaceous limestone.
In this manner would the first beds of crystalline schist, such as mica-schist, be formed, probably out of sandy and clayey muds, or arenaceous and argillaceous shales.
The conglomerate group passes insensibly into the arenaceous group; for, from the coarsest gravel to the finest sand, the gradation is unbroken, and every sandstone is merely a conglomerate on a small scale.
Hence, we find that the fragmental rocks are composed principally of two minerals, quartz and kaolin,—the former predominating in the conglomerate and arenaceous groups, and the latter in the argillaceous group.
Sand-dunes in deserts or on coasts are unconsolidated arenaceous rock-masses.
These Alum Shales, as they are termed, rest unconformably upon Precambrian rocks, and have arenaceous and conglomeratic deposits at the base.
On the east side of the Pennine Chain, the Lower Permian sandstone is an inconstant deposit often consisting of yellow false-bedded arenaceous strata.
Representations of the Portlandian and Purbeckian beds are found in Lincolnshire and Yorkshire, as arenaceous deposits in the former county and argillaceous ones in the latter.
In North Wales the Llandovery beds occasionally present the shelly arenaceous types of deposit as near Llangollen, at other times as near Conway, Corwen, and in Anglesey, the graptolitic shale type.
These rocks are succeeded by thin arenaceous and calcareous beds which represent either the Solva or Menevian beds of Wales.
The sandy deserts of the rainless districts of Chili are also of great extent: and there are few countries in even the higher latitudes that have not their tracts of arenaceous waste.
The Oolite forms the intermediate member of the system, and consists of alternations of clay, arenaceous rock and limestone.
Animated with life, this membrane is irritable and encloses the polyp; it becomes friable or arenaceous in drying.
The first are irregular and arenaceous masses, which pile themselves upon plants and solid bodies immerged in fresh water.
Its banks consist of a black arenaceous fertile soil, which is stated to produce abundantly, in its season, the wild species of cepa, or leek.
The scenery of its coasts is in part arenaceous plains, and in part arable land, yielding corn to the Indians.
These ancient dunes and ridges were covered sparsely with pitch pines and aspen, and having their surfaces covered with the uva ursi, pyrola, and smaller shrub-growth common to arenaceous soils.
The arenaceous and calcareous upper deposits assume nearly the position of the oolitic series, and, in fact, ought, in some localities, to be regarded as equivalents.
In some of the more arenaceous parts of the conglomerate, there was an oblique or current lamination; a circumstance which I did not elsewhere observe.
Above these porphyries comes a coarse, arenaceous conglomerate, the lower half white and the upper half of a pink colour, composed chiefly of pebbles of various porphyries, but with some of red sandstone and jaspery rocks.
The Pampean mud is here of a rather pale colour, and includes small nearly white nodules, and other irregular strata of an unusuallyarenaceous variety of tosca-rock.
On an arenaceous strip projecting from the western edge the women were washing and panning where the bottom of the digging was below that of the river.
In places the gneiss has been so little changed by heat and pressure that it forms arenaceous flags and shales.
Calcareous and arenaceous rocks, of which the mountains surrounding Etna are composed, and which appear capped with lava near Bronte and elsewhere.
It would seem that these two ranges skirting a part of the northern and southern banks of the Lower Amazons are not the only remnants of this arenaceous formation in its primitive altitude.
Such are the cotton-wood and the beech-grape, species which are usually confined to the arenaceous alluvions of valleys.
These underclays, co-extensive with every layer of coal, consist of arenaceous shale, sometimes called firestone, because it can be made into bricks which stand the fire of a furnace.
Whether all the freshwater formations of the Limagne d'Auvergne belong to one period, I cannot pretend to decide, as large masses both of the arenaceousand marly groups are often devoid of fossils.
But the most remarkable of the arenaceous groups is one of red sandstone and red marl, which are identical in all their mineral characters with the secondary New Red sandstone and marl of England.
The loftiest of the Cyclopian islets, or rather rocks, is about 200 feet in height, the summit being formed of a mass of stratified clay, the laminae of which are occasionally subdivided by thin arenaceous layers.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "arenaceous" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: grainy; granular; granulated; gravelly; gritty; pebbly; sandy; shingled
