They who still question this opinion may call the rocks under consideration the stratified hypogene, or schistose hypogene formations.
It also passes in the same uninterrupted manner into a basalt, and at length into a soft claystone, with a schistose tendency on exposure, in no respect differing from those of the trap islands of the western coast.
Here it loses part of its schistose structure, but the separation into parallel layers is still discernible.
This peculiarity of form is no doubt mainly due to the schistose character of the rock from which the implement is made; which, in the case of the original of Fig.
They are formed of schistose rock, and some of them still bear traces of the action of fire.
Lower down are schistose sandstones of which the Esquimaux make the heads of their arrows.
On the right bank opposite the site of the old Fort Good Hope, there are natural ramparts of limestone or schistose sandstone at the mouth of Thunder river.
A little lower down, below the rock, the beaches of the Emir present unequivocal traces of other schistose holes which have been extinct for a long time, but which the writer of the letter found in combustion in 1869.
In many cases these rocks have been crushed and sheared, a slaty cleavage or schistose structure has been superinduced, and the original minerals have been broken and altered, both in their shape and composition.
The serpentine there belongs rather to theschistose hornblende (hornblendschiefer), as in the island of Cuba.
This quartz passes sometimes into hornstein, and sometimes into kieselschiefer (schistose jasper).
Schistose structure probably does not always denote shearing, at least not the shearing which results from folding.
These zones of schistose rock a few inches in thickness were developed from the quartzite by the slipping of the rock on either side.
Along the railway at Devil's lake, half a mile south of the Cliff House, thin zones of schistose rock may be seen parallel to the bedding planes.
Besides the schistose belts, a wide zone of quartzite exposed in the bluffs at this locality has been crushed into angular fragments, and afterwards re-cemented by white quartz deposited from solution by percolating waters (Plate X).
The Laurentian rocks of this region resemble those of the Laurentide area, and consist of highly crystalline schistose and gneissose rocks associated with compact rocks.
The crystalline schists consist of rocks of very varied lithological characters, some with gneissose, and others with schistose structure, and they vary in degree of acidity from ultrabasic rocks to those of acid composition.
In doing so, the term 'crystalline schists' will be used somewhat vaguely with reference to a complex of schistoserocks of which the mode of origin cannot be fully determined.
If we admit such views, the igneous origin of schistose rocks becomes conceivable, and is in fact maintained by many.
Many are mere holes in the earth--lairs, shapeless as nature left their walls, but roofed over with branches and grass held in place by schistose slabs that serve for slates.
Red shale and blue, cinder-grey and lemon-yellow; some schistose and sparkling, the bulk dull and dead.
Among these may be mentioned cordierite and sillimanite gneisses, andalusite and kyanite mica schists, and those schistosecalc silicate rocks which are known as cipolins.
In these biotite hornfelses the minerals, which consist of aluminium silicates, are commonly found; they are usually andalusite and sillimanite, but kyanite appears also in hornfelses, especially in those which have a schistose character.
They were thickly covered with eucalypti and brush, and, though based upon sandstone, were themselves of a schistose formation.
Northward the granitic chain of the Silla de Caracas and Porto Cabello are separated from the Llanos by a screen of mountains that are schistose between Villa de Cura and Parapara, and calcareous between the Bergantin and Caripe.
The sequence is grey granite below, the band of chalcedony, and above it a curious schistose gneiss-formation.
After marching three miles we camped at the foot of the ridge to be ascended next morning: the place is called Safhat el-Mu'ayrah from a slaty schistose hill on the eastern bank.
These are from twelve to fourteen feet in thickness, and being built of thin flat schistose slate, the walls remain in parts fully fourteen feet high, and apparently as perfect as when first erected.
It is traversed by banks of schistose jasper,* (Kieselschiefer of Werner.
It is remarkable that we find the schistose jasper which in Europe characterizes the transition rocks,* (The transition-limestone and schist.
A gulf, containing hot and submarine springs, divides the secondary from the primary and schistose rocks of the peninsula of Araya.
Near these caverns we saw strata of schistose marl, and found, with great astonishment, rock-crystals encased in beds of alpine limestone.
The clay, which renders the soil so slippery, is produced by the numerous layers of sandstone and schistoseclay crossing the bluish grey alpine limestone.
On the northern declivity of the Imposible, near the Penas Negras, an abundant spring issues from sandstone, which alternates with a schistose clay.
Can these flames be attributed to the decomposition of water, entering into contact with the pyrites dispersed through the schistose marl?
It is a rock of schistose sandstone, decomposed, covered with clay, the talus of which appears frightfully steep, from the effect of a very common optical illusion.
The schistosegneiss is continuous in direction of bed, with the harder gneiss below.
Immediately above this schistose is a superincumbent mass of sandstone which appeared to form the upper structure of the island.
Small grooved axe of schistose rock, much flaked off at each end.
Grooved axe of schistose rock, much flattened, with a small second groove below the larger one.
Rudely shaped sinker (or what is called a sinker), rounded at each end and grooved in center; schistose rock.
Goppert describes three other Cycadeae (species of Cycadites and Pterophyllum), found in the brown carboniferous schistose clay of Alt-sattel and Commotau, in Bohemia.
The inner zone of crystalline and schistose rocks which forms the main chain of the Alps, is absent in the Apennines except towards the southern end.
In Calabria the chain consists chiefly of crystalline and schistose rocks; it is the Mesozoic and Tertiary zone which has here been sunk beneath the sea.
At the same time a schistose structure is produced.
Immediately above this schistose stratum is a superincumbent mass of sandstone, which appeared to form the upper stratum of the island.
In the case of intense contact metamorphism, the altered rock assumes a new form, and may exhibit a crystalline and foliated or schistose structure.
The mines of California are also largely in schistose rocks, as are also those to the northward, throughout the Pacific mountains, to British Columbia and Alaska, including the recently established mining district at Cape Nome.
They are not only intensely folded and crushed, but in large part have been caused to flow under great pressure, and have thus acquired a schistose structure.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "schistose" in a variety of sentences. We hope that you will now be able to make sentences using this word.
