The neighbouring mountain abounded with a very black fissile aluminous stone.
The lofty mountains, piled one upon another, showed no signs of volcanic fire, but were covered with stones, all of a fissile kind, and by that means easily distinguishable.
In this case, and in that of the fissile pumice-stone, the structure is very different from that in the foregoing cases, where the laminae consist of alternate layers of different composition or texture.
Vulcano, which have a vitreous texture, are streaked with parallel white lines: he further describes a solid pumice-stone which possesses a fissile structure, like that of certain micaceous schists.
Mr. Darwin attributes the lamination and fissile structure of volcanic rocks of the trachytic series, including some obsidians in Ascension, Mexico, and elsewhere, to their having moved when liquid in the direction of the laminae.
Rippled slabs of fissile oolite are used for roofing, and have been traced over a broad band of country from Bradford in Wilts, to Tetbury in Gloucestershire.
The fissile limestone of Monte Bolca, near Verona, has for many centuries been celebrated in Italy for the number of perfect Ichthyolites which it contains.
Associated with the earliest ichthyic remains of the Old Red Sandstone, we find vegetable organisms in such abundance, that they communicate often a fissile character to the stone in which they occur.
In the lowest part of this division, beds of pure marl alternate with compact fissile tuff, resembling some of the subaqueous tuffs of Italy and Sicily called peperinos.
Rippled slabs of fissile oolite are used for roofing, and have been traced over a broad band of country from Bradford, in Wilts, to Tetbury, in Gloucestershire.
A] A fissile texture is occasionally assumed by clinkstone and other trap rocks, so that they have been used for roofing houses.
I have observed the elytra and other parts of beetles in a band of fissile clay, separating two beds of recent shell-marl, in the Loch of Kinnordy in Forfarshire.
In these recent formations, as seen in Forfarshire, two or three beds of calcareous marl are sometimes observed separated from each other by layers of drift peat, sand, or fissile clay.
The fissile structure results from the solidification of the particles composing each layer separately.
Sometimes this last variety loses all appearance of a fissile structure, and is composed almost wholly of hornblende.
They are made of shells, bones, fissile minerals, sometimes pieces of calcareous or fissile crystal.
The lack of more intense contact effects is a little remarkable in view of the altered character of the inclusions, all of which are crystalline in contrast to the fissileshales from which they are chiefly derived.
At Santa Ana they become more fissile and slaty in character and in several places are quarried and used for roofing.
The deeply weathered fissile mica schists east of Pasaje (see Appendix C for all locations) are also unconformably overlain by conglomerate and sandstone of Carboniferous age.
They are composed chiefly of greenish-colored fissile sandstones and calciferous grits, in which we meet a few fossils, very imperfectly preserved.
Shale is a more or less indurated fissile or laminated clay.
Most usually the 'cleavage,' as this fissile structure is termed, crosses the bedding at all angles.
Where masses of fissile and foliated rocks alternate together, the cleavage and foliation, in all cases which I have seen, are parallel.
In those not uncommon instances, where a mass of clay-slate, in approaching granite, gradually passes into gneiss, we clearly see that folia of distinct minerals can originate through the metamorphosis of a homogeneous fissile rock.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "fissile" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: brittle; crisp; crumbly; delicate; fissile; flimsy; fragile; frail; friable; shivery; vulnerable
