Underneath the foraminiferal limestones in this locality occur bedded coarse tufaceous sandstones, slightly inclined E.
Here there are alternating beds, a few inches thick, of coarse and fine tufaceous sandstones, sometimes calcareous, with marls or calcareous clays.
A palagonitic tufaceous sandstone exposed in the cliffs on the north coast of Naivaka contains a little carbonate of lime, and being probably a submarine deposit it implies an emergence of the sea-border.
At the mouth of the Ndavutu River, there are exposed tufaceous sandstones and a tuff-conglomerate, probably in great part formed of palagonitic materials, but I have kept no specimens.
These interbedded clays andtufaceous sandstones of the Mbenu-tha cliffs were deposited under somewhat different conditions.
The secondary formation is represented by a fine limestone, in some places almost fit for the purposes of lithography, and a coarse gypsum often of a tufaceous nature.
In many places were signs of water: lines of basalt here and there seamed the surface, and wide sheets of the tufaceous gypsum called by the Arabs Sabkhah shone like mirrors set in the russet framework of the flat.
The highly inclined strata of ancient sandstone and shale rise even to the rim of one side of the crater; but they are overspread by quartzose gravel, and this again is covered by volcanic scoriae and tufaceous sand.
It appears that many layers of marl, tufaceous limestone, and travertin, with beds of flint, continuous or in nodules, accumulated in these lakes.
Tufaceous conglomerates result from the intermixture of rolled fragments or pebbles of volcanic and other rocks with tuff.
Among the fragments which abound in the tufaceous breccias of Somma, none are more common than a saccharoid dolomite, supposed to have been derived from an ordinary limestone altered by heat and volcanic vapours.
In connection with these convulsions, there are found, on the shores of the Bay of Baiae, recenttufaceous strata, filled with articles fabricated by the hands of man, and mingled with marine shells.
Here numerous proofs are seen of submarine eruptions, by which the argillaceous and sandy strata were invaded and cut through, and tufaceous breccias formed.
The tufaceous alluvium called trass, which has covered large areas in this region and choked up some valleys now partially re-excavated, is unstratified.
This tufaceous stone presents itself in very thick banks, traversed by long vertical and oblique fissures, probably produced by the contraction of the mass on passing from a humid and soft to a dry and hard state.
This kind of building is the natural product of the peculiar parallel cleavage in the tufaceous rocks of the Roman hills.
The second, of which all the hills on the eastern bank and the district of the Campagna are composed, is of volcanic origin, and consists chiefly of beds of tufaceous matter erupted from submarine volcanoes and more or less solidified.
Above the Pithecanthropus layer were the 'Kendeng' strata, a many-layered tufaceous sandstone, about 15 meters in thickness.
Both men and women braid palm, and in every yard there is excavated in the soft, tufaceous rock, a cueva, or cave, in which they work.
At Jilmeca and some other points along the day's route the rock over which we passed was a white tufaceous material loaded with streaks of black flint.
The neighbouring peninsula of Lacuy is almost wholly formed of tufaceous deposits, connected probably in their origin with the volcanic hills just described.
The tufaceous stratum on which this feldspathic lava rests is much hardened, stained purple, and has a spherico-concretionary structure; it here contains a good many pebbles of claystone porphyry.
The crest of this first main ridge and the surrounding mountains, with the exception of a few lofty pinnacles, are capped by a great thickness of a horizontally stratified, tufaceous deposit.
Some masses of tufaceous deposit, produced by this spring, have an oolitic texture.
Puzzuoli itself stands chiefly on a promontory of the oldertufaceous formation, which cuts off the new deposit, although I detected a small patch of the latter in a garden under the town.
He pointed out with great clearness the resemblance of the tufaceous matter in the vaults and cellars at Herculaneum and Pompeii to aqueous alluviums, and its distinctness from ejections which had fallen through the air.
In the tufaceous strata, wood is seen converted into a light tufa.
The tufaceous alluvium called trass, which has covered large areas in the Eifel, and choked up some valleys now partially re-excavated, is unstratified.
The tufaceous envelope of the fossils may have fallen into the lake from the air as volcanic dust, or have been washed down into it as mud from the adjoining land.
Tracking on sandy or tufaceous ground is an easy matter, as of course the foot leaves a well-marked print; but where I found real difficulty was over rocky ground, until I got used to it, and knew all the signs and what I had to look for.
In the western part the tertiaries are more tufaceous than on the south-east coast, and they are distinguished mainly by the presence of shales and andesite breccia.
Newbold, on the kunker, a tufaceous deposit in India, xlix, 398.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tufaceous" in a variety of sentences. We hope that you will now be able to make sentences using this word.
