These are distinguishable from the grey Chalk coprolites by their brownish ferruginous colour and smooth appearance.
The shapes of these ferruginous sandstones are very fantastic - tubes, hollow spheres, plates, &c., being common.
The soil is composed of red ferruginous kankar, with a stratum of clay in the more elevated parts, covered by a thin layer of vegetable mould, or by recent alluvial deposits.
Soils are of four classes: calcareous-ferruginous, alluvial, argillous and silicious.
Cold mineral springs are at Bartfa, with alkaline ferruginous waters; Czigelka, with iodate waters; Parad, with ferruginous and sulphate springs; Koritnicza or Korytnica, with strong iron springs; and the mineral springs of Budapest.
In the Marico district the shales become highly ferruginous and resemble the Hospital Hill slates of the Witwatersrand series.
They are next steeped in a bath, first of molten ferruginous, then of pure tin.
In their upper courses all the southern affluents of the Ghazal flow across a plateau of ferruginous laterite, their valleys having steep banks.
It is celebrated for its medicinal waters, of which the Alexisbrunnen, a ferruginous spring, is used for drinking, while the Selkebrunnen supplies the baths, which are of use in feminine disorders.
In the vicinity are the royal stud-farm (horses and dromedaries) of Cascine di San Rossore, and the mineral baths of San Giuliano, alkaline-ferruginous, with temperature 91.4° to 105.8° Fahr.
It has been sought to work again the ancient quarries of Shemtu, but it was found that the marble had been spoilt by ferruginous and calcareous veins.
The gold ores of Peru are usually found in ferruginous quartz.
In its neighbourhood, surrounded by pine forests, are the baths of Bartfa, with twelve mineral springs - iodate, ferruginous and alkaline - used for bathing and drinking.
It is indigenous to the south of Spain and the north of Africa (where it is known as Halfa or Alfa), and is especially abundant in the sterile and rugged parts of Murcia and Valencia, and in Algeria, flourishing best in sandy, ferruginous soils, in dry, sunny situations on the sea coast.
Within a mile of Hammam Meskutin are ferruginous and sulphureous springs.
The ore is chiefly haematite, and has been developeci from antecedent ferruginous sedimentary deposits, through concentration and purification by ground water.
The ferric hydrate is also readily deposited from ferruginous waters, often by means of organic agencies.
Limonite often forms a cementing medium in ferruginous sands and gravels, forming "pan"; and in like manner it is the agglutinating agent in many conglomerates, like the South African "banket," where it is auriferous.
- Whether a ferruginous rock is or is not ore is purely a question of current demand and supply.
The diamond is found under three conditions: (1) in the gravels of the present rivers, embedded in a ferruginous claycemented conglomerate known as cascalho; (2) in terraces (gupiarras) in a similar conglomerate occupying higher levels in the present valleys; (3) in plateau deposits in a coarse surface conglomerate known as gurgulho, the diamond and other heavy minerals being embedded in the red clay which cements the larger blocks.
Water from moors and peatbogs or from gravel or ferruginous sandstone is generally of small utility so far as plant food is concerned.
Laterite is a ferruginous and argillaceous rock, varying from 30 to 200 ft.
The Sugar Plantations: The soil of the island is of considerable fertility; it is a ferruginous red clay, but so largely mingled with stones of all sizes that no plough can be used, and the hoe has to be employed to prepare the ground for cultivation.
At the base is the so-called "blue clay" (really greenish) with ferruginous sandstones and with a fucoidal sandstone at its summit.
Copper is widely distributed in nature, occurring in most soils, ferruginous mineral waters, and ores.
It has been discovered in seaweed; in the blood of certain Cephalopoda and Ascidia as haemocyanin, a substance resembling the ferruginous haemoglobin, and of a species of Limulus; in straw, hay, eggs, cheese, meat, and other food-stuffs; in the liver and kidneys, and, in traces, in the blood of man and other animals (as an entirely adventitious constituent, however); it has also been shown by A.
The hills consist of a kind of granite and of beds of red sandstone, the disintegration of which has given a darkcoloured ferruginous soil of moderate fertility.
Of the town are the baths of Banko, with alkaline and ferruginous springs, and about 12 m.
There are altogether 12 mineral springs with saline, alkaline and ferruginous waters, of which the oldest and most important is the Franzensquelle.
Masses of laterite, buried in hard ferruginous clay, crop up as rocks or slabs.
In the central portion, which belongs to the Triassic formation, magnesian limestone, ferruginous sandstone and gypsum are representative rocks.
Its waters, which are ferruginous and largely charged with carbonic acid gas, are of use in nervous and rheumatic disorders.